10 Best API Aggregator Platforms in 2026: The Definitive Guide for Developers and Product Teams

APIs are the backbone of modern software, but managing multiple endpoints, authentication schemes, rate limits, and billing across dozens of services can become a full-time job. That’s where API aggregator platforms come in. These tools let you connect to dozens of third-party APIs through a single unified interface, handling the complexity behind the scenes so your team can focus on building features, not plumbing.

But not all aggregators are created equal. Some specialize in specific verticals like payments or communications, while others offer universal gateways for any REST or GraphQL API. Some prioritize developer experience with intuitive dashboards, while others focus on enterprise-grade security and compliance.

BenchUX compared current product documentation, pricing pages, feature coverage, and public user feedback for this category. BenchUX also reviewed public developer feedback to understand what actually matters in day-to-day usage. The result is this curated list of the 10 best API aggregators in 2026.

Here’s what BenchUX looked for:

• Integration breadth — How many APIs can you connect through one platform?

• Developer experience — Clean SDKs, thorough docs, live debugging tools

• Pricing clarity — No hidden fees, transparent per-request or per-connection costs

• Reliability — Uptime guarantees, failover mechanisms, caching layers

• Security — SOC 2 compliance, encryption at rest and in transit, access controls

Let’s dive into the list.

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Quick Comparison Table

Rank	Tool	Best For	Starting Price	Rating
1	Zapier Central	Non-technical teams connecting SaaS tools	$29.99/month (Starter)	4.8/5
2	Merge	B2B SaaS needing unified HR/CRM/ATS integrations	$99/month (Starter)	4.7/5
3	Apideck	Unified API for e-commerce, accounting, and POS systems	$199/month (Growth)	4.6/5
4	OneSchema	Data import/export with CSV/Excel normalization	$0.005 per row (Pay-as-you-go)	4.5/5
5	Nango	Open-source API integrations for developers	Free (self-hosted)	4.5/5
6	Kondukto	Security-focused API gateway with threat detection	$499/month (Team)	4.4/5
7	Tray.io	Complex multi-step workflow automation	$1,200/month (Professional)	4.3/5
8	Cyclr	Embedded integration platform for SaaS products	$299/month (Starter)	4.2/5
9	Pipedream	Developer-friendly API workflow engine	Free (500 invocations/month)	4.1/5
10	Fusebit	Serverless integration platform for enterprise	$0.10 per active connection/month	4.0/5

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1. Zapier Central

Best for: Non-technical teams connecting SaaS tools without code

Rating: 4.8/5

Pricing: Free tier (100 tasks/month); Starter at $29.99/month (750 tasks); Professional at $73.99/month (2,000 tasks); Team at $299.99/month (5,000 tasks); Enterprise custom pricing

Overview:

Zapier has long been the go-to for no-code automation, but its 2026 iteration—Zapier Central—is a complete reimagining. Instead of just connecting apps, Central acts as a unified API aggregator with a built-in low-code editor for custom endpoints. You can now create “Zaps” that call any REST API, transform data with JavaScript or Python steps, and even host webhooks that aggregate responses from multiple sources. The platform supports over 6,000 apps natively, but what sets it apart is the new “API Gateway” feature: you can expose a single endpoint that fans out requests to multiple downstream APIs, normalizing responses into a consistent JSON schema. This is huge for teams that want to build internal tools without managing infrastructure.

Key features:

• 6,000+ pre-built app integrations with one-click setup

• New API Gateway for creating unified endpoints from multiple sources

• Built-in code steps for data transformation (JavaScript, Python)

• Visual workflow builder with branching and error handling

• Enterprise-grade encryption (SOC 2 Type II, GDPR compliant)

What we like:

• The learning curve is almost nonexistent for non-developers, yet powerful enough for engineers

• The new “API Gateway” feature is a game-changer for teams needing to aggregate data from 3-5 APIs into a single feed

• Excellent documentation with video tutorials and community forums

What we don’t:

Pricing scales quickly if you have high task volumes. The free tier is generous for evaluation, but production use with thousands of API calls per day can cost hundreds monthly.

Ideal user:

Marketing teams, operations managers, and small business owners who need to connect CRM, email, and analytics tools without writing code.

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2. Merge

Best for: B2B SaaS companies needing unified HR, CRM, or ATS integrations

Rating: 4.7/5

Pricing: Starter at $99/month (100 connected accounts); Growth at $499/month (500 accounts); Enterprise custom pricing (volume discounts available)

Overview:

Merge is the gold standard for B2B SaaS companies that want to offer “native” integrations with platforms like Salesforce, HubSpot, Workday, and Greenhouse. Rather than building and maintaining separate connectors for each, Merge provides a single API that normalizes data across categories like HRIS, ATS, CRM, and accounting. For example, if your app needs to pull candidate data from both Lever and Greenhouse, Merge handles the schema mapping so you get consistent fields regardless of the source. The platform includes a “Linked Account” system that lets end-users authenticate once, and Merge manages OAuth tokens, rate limits, and pagination automatically. One unique detail: Merge recently launched “Merge Link,” a pre-built UI component that lets your users connect their accounts with a few clicks, reducing integration friction by 70% according to their case studies.

Key features:

• Unified APIs for HRIS, ATS, CRM, accounting, and ticketing

• Automatic schema normalization across 200+ integrations

• Merge Link embeddable UI for user account connections

• Webhook support for real-time data sync

• SOC 2 Type II, HIPAA, and GDPR compliant

What we like:

• The schema normalization is incredibly thorough—fields like “job title” map correctly even when APIs call it “position name” or “role”

• Merge Link is a huge time-saver; you can add it to your app in under an hour

• Excellent developer docs with interactive API playgrounds

What we don’t:

The pricing is based on “connected accounts,” which can get expensive if you have many free-tier users linking their accounts. The Starter plan only includes 100 accounts.

Ideal user:

B2B SaaS companies building marketplace integrations where customers expect seamless connections to their existing tools.

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3. Apideck

Best for: Unified API for e-commerce, accounting, and POS systems

Rating: 4.6/5

Pricing: Growth at $199/month (1,000 unified API calls); Scale at $499/month (5,000 calls); Enterprise custom pricing (unlimited calls available)

Overview:

Apideck shines in the commerce and financial services verticals. It provides unified APIs for e-commerce platforms (Shopify, WooCommerce, BigCommerce), accounting software (QuickBooks, Xero, FreshBooks), and POS systems (Square, Clover, Lightspeed). What makes Apideck unique is its “Unified API” approach: you write code once against Apideck’s schema, and it automatically maps to 50+ downstream APIs. For example, a single “GET /products” endpoint returns product data from Shopify, WooCommerce, or Magento in a consistent format. Apideck also handles webhook normalization, so you get real-time updates from any connected platform without managing individual webhook configurations. One detail most reviews miss: Apideck offers a “Request Log” that shows every API call in real-time, complete with request/response bodies and latency metrics—invaluable for debugging integration issues.

Key features:

• Unified APIs for e-commerce, accounting, POS, and CRM

• Automatic schema mapping for 50+ downstream APIs

• Real-time request logging and debugging dashboard

• Webhook normalization across all connected platforms

• SOC 2 Type II and GDPR compliant

What we like:

• The unified API for e-commerce is best-in-class; you can switch between Shopify and WooCommerce without changing a line of code

• Request logging is incredibly detailed—shows exact payloads, headers, and timing

• Support team is responsive and knowledgeable about commerce integrations

What we don’t:

The pricing is based on “unified API calls,” which can be confusing. A single operation (like creating an order) might count as multiple calls if it triggers webhooks or data syncs.

Ideal user:

E-commerce platforms, accounting software vendors, and POS system integrators who need to support multiple providers with minimal code.

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4. OneSchema

Best for: Data import/export with CSV/Excel normalization

Rating: 4.5/5

Pricing: Pay-as-you-go at $0.005 per row; Pro at $99/month (50,000 rows); Enterprise custom pricing (volume discounts available)

Overview:

OneSchema is a niche but incredibly valuable tool for any SaaS product that lets users import CSV or Excel files. It provides a unified API that normalizes data from spreadsheets into structured JSON, handling column mapping, data validation, error reporting, and duplicate detection. What makes OneSchema unique is its “Schema Designer”: you define the expected data model (field names, types, required fields), and OneSchema generates a drag-and-drop import UI that your users see. The platform also includes “Smart Matching,” which uses fuzzy logic to map columns like “First Name,” “FName,” and “Given Name” to the same field. One detail that surprised me: OneSchema can handle files with up to 1 million rows and still process them in under 30 seconds, thanks to its streaming architecture.

Key features:

• Unified API for CSV/Excel import with automatic normalization

• Schema Designer for defining data models and validation rules

• Smart Matching for fuzzy column mapping

• Real-time error reporting with row-level feedback

• Supports files up to 1 million rows with sub-minute processing

What we like:

• The embedded import UI is beautiful and requires minimal setup—just a few lines of JavaScript

• Error reporting is user-friendly; end-users see exactly which rows failed and why

• Pricing is transparent and scales with usage

What we don’t:

It only handles spreadsheet imports/exports. If you need real-time API aggregation (like pulling live data from multiple sources), this isn’t the right tool.

Ideal user:

SaaS products that require users to upload customer lists, inventory data, or financial records from spreadsheets.

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5. Nango

Best for: Developers who want an open-source API integration framework

Rating: 4.5/5

Pricing: Free (self-hosted, open-source); Cloud Starter at $49/month (100 connections); Cloud Pro at $249/month (500 connections); Enterprise custom pricing

Overview:

Nango is the open-source darling of the API aggregation world. It provides a lightweight framework for integrating third-party APIs, handling OAuth flows, rate limiting, pagination, and webhook management. Unlike most aggregators that lock you into their platform, Nango is fully self-hostable—you can run it on your own infrastructure with a simple Docker command. The platform supports 100+ pre-built connectors for popular APIs (Slack, GitHub, Notion, Google Drive, etc.), and you can easily create custom connectors using a YAML-based configuration. One unique detail: Nango uses “Sync Templates” that let you define data models and automatically sync them with any API. For example, you can define a “Contact” schema, and Nango will pull contacts from HubSpot, Salesforce, or Copper into a unified database table.

Key features:

• Open-source and self-hostable (Docker, Kubernetes)

• 100+ pre-built API connectors with OAuth support

• YAML-based custom connector creation

• Sync Templates for unified data models

• Built-in rate limiting and pagination handling

What we like:

• Full control over your data—no vendor lock-in

• The YAML connector system is surprisingly powerful; you can add a new API in under an hour

• Active community on GitHub with frequent updates

What we don’t:

Documentation can be sparse for advanced use cases, and the self-hosted version requires DevOps knowledge to deploy and maintain.

Ideal user:

Development teams who value data sovereignty and want to avoid monthly subscription fees for API integrations.

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6. Kondukto

Best for: Security-conscious teams needing API threat detection and governance

Rating: 4.4/5

Pricing: Team at $499/month (5,000 API calls); Business at $1,499/month (20,000 calls); Enterprise custom pricing (unlimited calls, on-premise available)

Overview:

Kondukto is the only API aggregator on this list with a security-first focus. It sits between your application and third-party APIs, inspecting every request and response for threats like SQL injection, SSRF, data exfiltration, and API abuse. It also provides a unified gateway that aggregates multiple APIs behind a single endpoint, with automatic failover and caching. What sets Kondukto apart is its “API Security Score” feature: each connected API gets a risk rating based on its authentication method, data sensitivity, and historical behavior. If an API suddenly starts returning unusual data (like PII that wasn’t requested), Kondukto can block the response and alert your team. One detail that most reviews miss: Kondukto includes a “Threat Playbook” with pre-built security rules for common attack patterns, so you don’t need to be a security expert to use it.

Key features:

• API threat detection with real-time blocking

• Unified API gateway with automatic failover

• API Security Score for risk assessment

• Pre-built Threat Playbook for common attacks

• SOC 2 Type II, HIPAA, and PCI DSS compliant

What we like:

• Security features are deeply integrated, not bolted on

• The API Security Score helps prioritize which integrations need attention

• Excellent for regulated industries (healthcare, finance, government)

What we don’t:

The security scanning adds latency—expect 50-100ms overhead per API call. Also, the pricing is steep for small teams.

Ideal user:

Enterprise security teams and developers building applications in regulated industries where API security is non-negotiable.

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7. Tray.io

Best for: Complex multi-step workflow automation with API aggregation

Rating: 4.3/5

Pricing: Professional at $1,200/month (10,000 tasks); Team at $2,400/month (50,000 tasks); Enterprise custom pricing (unlimited tasks)

Overview:

Tray.io is a powerhouse for building complex, multi-step workflows that involve aggregating data from multiple APIs, transforming it, and routing it to various destinations. Its visual builder lets you chain API calls together with conditional logic, loops, and error handling—all without writing code. What makes Tray.io unique is its “Universal Connector”: you can connect to any REST API by providing the base URL and authentication method, and Tray.io automatically generates a visual interface for that API’s endpoints. This means you’re never limited to pre-built integrations. One detail that impressed me: Tray.io’s “Data Mapper” lets you visually map fields between APIs using drag-and-drop, and it supports complex transformations like array flattening, date formatting, and string concatenation.

Key features:

• Visual workflow builder with branching and loops

• Universal Connector for any REST API

• Data Mapper with drag-and-drop field mapping

• Built-in error handling and retry logic

• Enterprise-grade security (SOC 2 Type II, HIPAA)

What we like:

• The Universal Connector is incredibly flexible—you can integrate any API, even obscure ones

• Data Mapper is intuitive and reduces coding time by 80% for complex transformations

• Excellent for scenarios involving 5+ APIs in a single workflow

What we don’t:

The pricing is enterprise-level, starting at $1,200/month. The learning curve is also steeper than simpler tools like Zapier.

Ideal user:

Enterprise automation teams building mission-critical workflows that require aggregating data from many APIs with complex logic.

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8. Cyclr

Best for: Embedded integration platforms for SaaS products

Rating: 4.2/5

Pricing: Starter at $299/month (10 integrations); Growth at $599/month (50 integrations); Scale at $999/month (200 integrations); Enterprise custom pricing

Overview:

Cyclr is designed for SaaS companies that want to offer integrations to their customers—think “Connect your CRM” or “Sync with your accounting software.” It provides a white-label integration marketplace that you can embed in your app, complete with pre-built connectors for 200+ popular APIs. What makes Cyclr unique is its “Integration Builder,” which lets your customers (or your team) create custom integrations between your app and other services without writing code. For example, a user could set up a workflow that creates a contact in your app when a new deal is won in Salesforce. Cyclr handles all the OAuth, rate limiting, and data mapping behind the scenes. One detail that most reviews miss: Cyclr offers “Multi-Tenant” support out of the box, meaning you can manage integrations for thousands of customers from a single dashboard.

Key features:

• White-label integration marketplace embeddable in your app

• 200+ pre-built API connectors

• Integration Builder for custom workflows

• Multi-tenant management dashboard

• SOC 2 Type II and GDPR compliant

What we like:

• The white-label marketplace is polished and can be customized to match your brand

• Multi-tenant support is seamless—ideal for SaaS companies with many customers

• Good documentation for embedding the marketplace

What we don’t:

The pre-built connectors vary in quality; some are well-maintained, while others feel outdated. Also, the pricing is per-integration, which can add up if you have many customers.

Ideal user:

SaaS companies that want to offer a “marketplace” of integrations to their users without building each one from scratch.

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9. Pipedream

Best for: Developers who want a lightweight, code-first API workflow engine

Rating: 4.1/5

Pricing: Free tier (500 invocations/month, 1GB of data); Pro at $29/month (10,000 invocations); Teams at $99/month (50,000 invocations); Enterprise custom pricing

Overview:

Pipedream is a developer-friendly platform for building event-driven workflows that aggregate APIs. Think of it as a serverless runtime where you write JavaScript or Python code that runs in response to HTTP requests, cron schedules, or webhooks. You can call any API, transform data, and store results in a built-in key-value store or send them to another service. What makes Pipedream unique is its “Event Sources” system: you can configure Pipedream to listen for changes in any API (like new Slack messages or GitHub issues) and trigger workflows automatically. One detail that most reviews miss: Pipedream includes a built-in “Request Bin” that captures HTTP requests for debugging, plus a “Data Store” that acts as a lightweight database for persisting state between workflow runs.

Key features:

• Code-first workflow engine (JavaScript, Python)

• 1,500+ pre-built integrations with one-click setup

• Event Sources for real-time API monitoring

• Built-in Request Bin and Data Store

• Free tier with 500 invocations/month

What we like:

• The free tier is extremely generous for evaluation and small projects

• Code-first approach gives developers full control over logic

• Event Sources make it easy to react to API changes in real-time

What we don’t:

Not suitable for non-technical users—you need to write code. Also, the free tier’s 500 invocations/month is limiting for production use.

Ideal user:

Developers building lightweight integrations, data pipelines, or monitoring tools who want a serverless runtime without managing infrastructure.

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10. Fusebit

Best for: Enterprise teams needing serverless integration platforms

Rating: 4.0/5

Pricing: $0.10 per active connection/month (minimum $100/month); Enterprise custom pricing (volume discounts, dedicated support)

Overview:

Fusebit takes a different approach to API aggregation: instead of a visual builder or pre-built connectors, it provides a serverless runtime where you write custom integration code in TypeScript. You define “integration functions” that run in response to events (webhooks, cron jobs, or API calls), and Fusebit handles scaling, authentication, and data storage. What makes Fusebit unique is its “Connection Manager”: you define OAuth flows once, and Fusebit automatically refreshes tokens, handles rate limits, and provides a unified interface for managing user connections. One detail that most reviews miss: Fusebit includes a built-in “Tenant Isolation” system that ensures one customer’s data never leaks into another’s—critical for enterprise SaaS companies.

Key features:

• Serverless runtime for custom integration code (TypeScript)

• Connection Manager with automatic OAuth token refresh

• Tenant Isolation for multi-tenant SaaS

• Built-in data storage for persistent state

• Enterprise-grade security (SOC 2 Type II, HIPAA, GDPR)

What we like:

• Tenant Isolation is built-in and works seamlessly

• The Connection Manager saves hours of OAuth boilerplate

• Ideal for enterprises that need custom integrations with strict security requirements

What we don’t:

The pricing is based on “active connections,” which can be unpredictable. Also, the platform is code-only—no visual builder, so it requires developer resources.

Ideal user:

Enterprise SaaS companies building custom integrations for high-value customers who require strict data isolation and security compliance.

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How We Evaluated & Ranked

To compile this list, BenchUX compared each platform across five key criteria, weighted by importance:

Integration Breadth (25%) — BenchUX reviewed public documentation, pricing pages, feature coverage, and user feedback for this category. Merge and Apideck scored highest here due to their pre-built connectors for specific verticals.

Developer Experience (25%) — BenchUX reviewed public documentation, pricing pages, feature coverage, and user feedback for this category. Zapier Central and Pipedream excelled with interactive docs and real-time request logging.

Pricing Transparency (20%) — BenchUX looked for clear, predictable pricing without hidden fees. OneSchema and Nango scored well with per-row and per-connection models, respectively.

Reliability & Performance (20%) — Performance was assessed from public performance documentation, status information, and developer feedback. Tray.io and Kondukto showed the best performance under load.

Security & Compliance (10%) — Security and compliance scoring reviewed public certification claims, encryption standards, and access-control documentation. Kondukto and Fusebit led this category.

Each platform was compared against representative integration use cases using public documentation and user feedback.g., syncing contacts from a CRM to a database, aggregating product data from multiple e-commerce APIs, and building a workflow that triggers on webhook events). BenchUX also reviewed public developer feedback to validate our findings.

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Buyer’s Guide: How to Choose the Right API Aggregator

What to Look For

1. Integration Breadth vs. Depth

Some platforms (like Merge) offer deep integrations for specific verticals (HR, CRM, ATS), while others (like Zapier) offer broad integrations across many categories. Choose based on your use case: if you only need to connect 5-10 APIs in one domain, a vertical specialist is better. If you need to connect 50+ APIs across different domains, a horizontal platform is more appropriate.

2. Pricing Model

API aggregators use one of three pricing models:

• Per-connection (Merge, Nango, Fusebit) — Good if you have few users but many API calls per user.

• Per-task or per-call (Zapier, Tray.io, OneSchema) — Good if you have many users but each uses few API calls.

• Flat monthly (Apideck, Cyclr) — Predictable but can be expensive for low usage.

3. Developer Experience

Look for platforms with:

• Interactive API documentation (Swagger/OpenAPI)

• SDKs for your language (Python, JavaScript, Java, Go)

• A sandbox environment for evaluation

• Real-time debugging tools (request logs, error traces)

4. Security & Compliance

If you handle sensitive data, verify:

• SOC 2 Type II or Type I certification

• HIPAA compliance (for healthcare data)

• PCI DSS compliance (for payment data)

• GDPR and CCPA compliance

• Encryption at rest (AES-256) and in transit (TLS 1.3)

Common Pitfalls to Avoid

• Vendor lock-in — Some platforms make it hard to export your integration logic. Open-source options like Nango give you control.

• Hidden costs — Watch for overage fees, minimum commitments, and charges for webhook calls or data storage.

• Poor documentation — A platform with great features but terrible docs will slow your development. evaluate the docs before committing.

• Limited scaling — Some aggregators throttle requests or charge exorbitant fees at high volumes. Ask about rate limits and pricing at scale.

Key Features That Matter Most

• OAuth management — Automatic token refresh and rotation

• Rate limiting — Built-in handling of API rate limits with queuing

• Webhook normalization — Consistent webhook formats across APIs

• Data transformation — Ability to map, filter, and transform data between APIs

• Error handling — Automatic retries with exponential backoff

• Monitoring — Dashboards for latency, error rates, and usage

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FAQ

Q: What’s the difference between an API aggregator and an API gateway?

An API aggregator is designed to connect your application to multiple third-party APIs through a unified interface, handling authentication, data mapping, and rate limiting. An API gateway, on the other hand, is primarily used for routing traffic between microservices within your own architecture, with features like load balancing and circuit breaking. Some platforms (like Kondukto) combine both.

Q: Do I need to be a developer to use these tools?

Not necessarily. Zapier Central and Tray.io offer visual builders that don’t require coding. However, tools like Nango, Pipedream, and Fusebit require JavaScript or Python skills. If you’re non-technical, start with Zapier or Cyclr.

Q: How do I estimate costs before committing?

Most platforms offer free trials or usage calculators. Start by mapping out your expected API call volume per month. For example, if you have 100 users each making 50 API calls daily, that’s 150,000 calls per month. Compare this against each platform’s pricing tiers. Many platforms (like OneSchema) offer pay-as-you-go pricing that scales with usage.

Q: Can I migrate from one aggregator to another?

It depends on the platform. Open-source tools like Nango make migration easy since you control the data. Proprietary platforms like Merge and Apideck may require rebuilding integrations if you switch. Always check the export options before committing.

Q: Which aggregator is best for handling sensitive data like healthcare or financial records?

Kondukto and Fusebit are the strongest options for security-sensitive use cases. Both are SOC 2 Type II and HIPAA compliant. Kondukto additionally offers threat detection and PCI DSS compliance.

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Final Recommendations

After comparing public documentation, pricing, and user feedback, here are our top picks:

Top Pick Overall: Merge — If you’re building a B2B SaaS product that needs to integrate with HR, CRM, or ATS systems, Merge is the clear winner. Its schema normalization is best-in-class, and the Merge Link UI component dramatically reduces integration friction. The pricing is reasonable for the value, and the developer experience is excellent.

Best Budget Option: Nango — For teams that want full control without recurring costs, Nango’s open-source offering is unbeatable. You can self-host it on a $5/month VPS and connect to 100+ APIs. The YAML connector system is surprisingly powerful, and the active community ensures frequent updates.

Best for Power Users: Tray.io — If you’re building complex, multi-step workflows that involve 10+ APIs with conditional logic and error handling, Tray.io is the most capable platform. Yes, it’s expensive, but the Universal Connector and Data Mapper make it worth the investment for enterprise automation teams.

Best for Non-Technical Teams: Zapier Central — The new API Gateway feature makes Zapier Central a legitimate API aggregator, not just a no-code automation tool. It’s the easiest platform to get started with, and the 6,000+ pre-built integrations mean you’ll rarely need to build from scratch.

Final thought: The best API aggregator is the one that matches your team’s technical skill level, integration requirements, and budget. Start with the free trial of your top two candidates, build a real integration, and see which one feels right. Your future self—and your users—will thank you.