Best API Integration Platforms in 2026
Updated
In short: Knit is ranked #1 of 34 as of 4 October 2026, ahead of Apache NiFi and Windmill. The best-ranked option with a free plan is Apache NiFi. The lowest first paid tier on this page is Sheety at $9.99/mo.
Connecting APIs often means building repeatable workflows across services and deciding how much control you need over deployment. The ranked entries begin with Celigo, Windmill, and n8n, with Apache Camel and Google Cloud Application Integration also among the first options. Compare workflow builders, reusable workflows, webhook triggers, and custom connectors to understand how each supports integration work. Self-hosted deployment is another consideration if where a platform runs matters to you. The list also compares free-plan availability, included executions, and paid-from pricing, giving you a way to weigh workflow capabilities against the listed plan details for your project.
34 API integration platforms ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Knit Top pick · 7.3 
#2 Apache NiFi Runner-up · 7.0 Free plan · Free
#3 Windmill Also great · 7.0 Free plan · $120/mo
- Free planFree trial AndroidapiiOSWeb
- Free plan
- Yes
- Paid from
- 29 /mo
- Workflow builder
- code
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Workflow builder
- visual
- Self-hosted deployment
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms - Free planFree trial apiLinuxself-hostedWebWindows
- Free plan
- Yes
- Paid from
- 120 /mo
- Workflow builder
- hybrid
- Self-hosted deployment
- Yes
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms$120/mofirst paid tier About WindmillVisit site - Free planFree trial Web
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free plan apiself-hostedWeb
- Free plan
- Yes
- Paid from
- 50 /mo
- Workflow builder
- code
- Self-hosted deployment
- Yes
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms$50/mofirst paid tier About NangoVisit site - Free plan apiWeb
- Free plan
- Yes
- Paid from
- 75 /mo
RecognisedDocumentedFree planPlatforms$75/mofirst paid tier About Workato Agent StudioVisit site - Free planFree trial apiWeb
- Free plan
- Yes
- Workflow builder
- visual
- Self-hosted deployment
- No
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms - Free plan Web
- Free plan
- Yes
- Paid from
- 9.99 /mo
- Self-hosted deployment
- No
RecognisedDocumentedFree planPlatforms$9.99/mofirst paid tier About SheetyVisit site - Free trial apiWebRecognisedDocumentedFree planPlatforms
- WebWindowsLinuxRecognisedDocumentedFree planPlatforms
- Free trial WebWindowsmacOSLinux
- Free plan
- No
- Workflow builder
- hybrid
- Self-hosted deployment
- Yes
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms - self-hosted
- Free plan
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms€20/mofirst paid tier About n8nVisit site - LinuxWindowsmacOS
- Free plan
- Yes
RecognisedDocumentedFree planPlatforms - Free trial apiself-hostedWeb
- Free plan
- No
- Paid from
- 99 /mo
RecognisedDocumentedFree planPlatforms$99/mofirst paid tier About BoomiVisit site - WebRecognisedDocumentedFree planPlatforms
- Free trial apiWeb
- Free plan
- No
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
- Paid from
- 2,000 /mo
- Workflow builder
- hybrid
- Self-hosted deployment
- Yes
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms$2,000/mofirst paid tier About MuleSoft ComposerVisit site - WebmacOS
- Free plan
- No
- Paid from
- 499 /mo
- Workflow builder
- code
- Self-hosted deployment
- No
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms$499/mofirst paid tier About PandiumVisit site - Web
- Free plan
- No
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- No
RecognisedDocumentedFree planPlatforms - Web
- Workflow builder
- visual
- Self-hosted deployment
- No
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms -
- Free plan
- No
- Paid from
- 2,000 /mo
- Workflow builder
- hybrid
- Self-hosted deployment
- Yes
- Custom connectors
- Yes
- Webhook triggers
- Yes
RecognisedDocumentedFree planPlatforms$2,000/mofirst paid tier About Mule ESBVisit site - Web
- Free plan
- No
RecognisedDocumentedFree planPlatforms
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which API integration platform is ranked first on Everything Xiaomi?
Knit is ranked #1 of 34 with a score of 7.3. Apache NiFi is second and Windmill third.
How many of these have a free plan?
8 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Sheety has the lowest first paid tier we found: $9.99/mo.
How is this list ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.