⚡ToolSwitcher

Affiliate Disclosure: Some links on this site are affiliate links. If you sign up or purchase through them, we may earn a commission at no extra cost to you. Learn more.

Home/Categories/API Tools

🔗

Best API Tools Tools

API development, testing, and documentation tools for developers.

113 tools•62 with free tiers•40 open source

📊 Quick Comparison

Tool	Free Tier	Starting Price	Rating	Open Source	Best For
Postman	✓ Free for individuals	$12/user/month	⭐ 4.5	No	API development teams and comprehensive API lifecycle management
Insomnia	✓ Free plan	$5/user/month	⭐ 4.4	✓ Yes	Developers who prefer a clean, fast API client
Hoppscotch	✓ Fully free	Free	⭐ 4.4	✓ Yes	Developers wanting a lightweight open-source API client
Bruno	✓ Free and open source	Free	⭐ 4.5	✓ Yes	Developers wanting Git-native API testing
Swagger / OpenAPI	✓ SwaggerHub Free	$75/mo	⭐ 4.2	✓ Yes	API-first development teams
RapidAPI	✓ Free tier available	$20/mo	⭐ 4.1	No	Developers discovering and integrating third-party APIs
Kong	✓ Kong Gateway OSS (free)	$150/mo	⭐ 4.3	✓ Yes	Organizations needing API gateway and service mesh
Stoplight	✓ Free for individuals	$39/user/mo	⭐ 4.2	No	Teams practicing API design-first development
Mockoon	✓ Fully free and open source	Free	⭐ 4.3	✓ Yes	Developers needing quick local API mocking
Treblle	✓ Free tier available	$99/mo	⭐ 4.2	No	API teams wanting automatic documentation and observability

All API Tools Tools

Postman

API development environment for designing, testing, and documenting APIs.

Best for: API development teams and comprehensive API lifecycle management

Paid: $12/user/month

Free Tier⭐ 4.5

Try Free →View Details

Insomnia

REST and GraphQL API client for testing and designing APIs.

Best for: Developers who prefer a clean, fast API client

Paid: $5/user/month

Free TierOpen Source⭐ 4.4

Try Free →View Details

Hoppscotch

Open-source API development ecosystem for developers.

Best for: Developers wanting a lightweight open-source API client

Free TierOpen Source⭐ 4.4

Try Free →View Details

Bruno

Open-source IDE for API exploration and testing.

Best for: Developers wanting Git-native API testing

Free TierOpen Source⭐ 4.5

Try Free →View Details

Swagger / OpenAPI

API design, documentation, and development tools.

Best for: API-first development teams

Free TierOpen Source⭐ 4.2

Try Free →View Details

RapidAPI

World's largest API hub for discovering and connecting to APIs.

Best for: Developers discovering and integrating third-party APIs

Free Tier⭐ 4.1

Try Free →View Details

Kong

Cloud-native API gateway and service connectivity platform.

Best for: Organizations needing API gateway and service mesh

Free TierOpen Source⭐ 4.3

Try Free →View Details

Stoplight

API design, documentation, and governance platform.

Best for: Teams practicing API design-first development

Paid: $39/user/mo

Free Tier⭐ 4.2

Try Free →View Details

Mockoon

Open-source desktop app for API mocking and prototyping.

Best for: Developers needing quick local API mocking

Free TierOpen Source⭐ 4.3

Try Free →View Details

Treblle

API observability and documentation platform.

Best for: API teams wanting automatic documentation and observability

Free Tier⭐ 4.2

Try Free →View Details

ReadMe

Interactive API documentation platform.

Best for: API-first companies creating developer documentation

Free Tier⭐ 4.3

Try Free →View Details

Labs Platform 1

Labs Platform 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Hub 1

Boost Hub 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

AI Works 1

AI Works 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 3.9

Try Free →View Details

Prime OS 1

Prime OS 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Forge Board 1

Forge Board 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.1

Try Free →View Details

Vertex Studio 1

Vertex Studio 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.7

Get Started →View Details

Flow Control 1

Flow Control 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.3

Try Free →View Details

Pilot Builder 1

Pilot Builder 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Pulse Flow 1

Pulse Flow 1 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.5

Try Free →View Details

Smart Desk 2

Smart Desk 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Labs Engine 2

Labs Engine 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Works 2

Boost Works 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.3

Get Started →View Details

AI Manager 2

AI Manager 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 3.9

Try Free →View Details

Prime Drive 2

Prime Drive 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Forge Portal 2

Forge Portal 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.1

Try Free →View Details

Vertex Control 2

Vertex Control 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Flow Kit 2

Flow Kit 2 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.3

Try Free →View Details

Pilot Suite 3

Pilot Suite 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 3.9

Get Started →View Details

Pulse Desk 3

Pulse Desk 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.5

Try Free →View Details

Smart Cloud 3

Smart Cloud 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Labs One 3

Labs One 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.7

Try Free →View Details

Boost Manager 3

Boost Manager 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

AI Studio 3

AI Studio 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 3.9

Try Free →View Details

Prime Center 3

Prime Center 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.5

Get Started →View Details

Forge Core 3

Forge Core 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.1

Try Free →View Details

Vertex Kit 3

Vertex Kit 3 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Flow Platform 4

Flow Platform 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.3

Try Free →View Details

Pilot Hub 4

Pilot Hub 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Pulse Cloud 4

Pulse Cloud 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.5

Try Free →View Details

Smart OS 4

Smart OS 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.1

Get Started →View Details

Labs Board 4

Labs Board 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Studio 4

Boost Studio 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

AI Control 4

AI Control 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 3.9

Try Free →View Details

Prime Builder 4

Prime Builder 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Forge Flow 4

Forge Flow 4 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.1

Try Free →View Details

Vertex Platform 5

Vertex Platform 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.7

Get Started →View Details

Flow Engine 5

Flow Engine 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.3

Try Free →View Details

Pilot Works 5

Pilot Works 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Pulse OS 5

Pulse OS 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.5

Try Free →View Details

Smart Drive 5

Smart Drive 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Labs Portal 5

Labs Portal 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Control 5

Boost Control 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.3

Get Started →View Details

AI Kit 5

AI Kit 5 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 3.9

Try Free →View Details

Prime Suite 6

Prime Suite 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Forge Desk 6

Forge Desk 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.1

Try Free →View Details

Vertex Engine 6

Vertex Engine 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Flow One 6

Flow One 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.3

Try Free →View Details

Pilot Manager 6

Pilot Manager 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 3.9

Get Started →View Details

Pulse Drive 6

Pulse Drive 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.5

Try Free →View Details

Smart Center 6

Smart Center 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Labs Core 6

Labs Core 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.7

Try Free →View Details

Boost Kit 6

Boost Kit 6 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

AI Platform 7

AI Platform 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 3.9

Try Free →View Details

Prime Hub 7

Prime Hub 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.5

Get Started →View Details

Forge Cloud 7

Forge Cloud 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.1

Try Free →View Details

Vertex One 7

Vertex One 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Flow Board 7

Flow Board 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.3

Try Free →View Details

Pilot Studio 7

Pilot Studio 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Pulse Center 7

Pulse Center 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.5

Try Free →View Details

Smart Builder 7

Smart Builder 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.1

Get Started →View Details

Labs Flow 7

Labs Flow 7 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Platform 8

Boost Platform 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

AI Engine 8

AI Engine 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 3.9

Try Free →View Details

Prime Works 8

Prime Works 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Forge OS 8

Forge OS 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.1

Try Free →View Details

Vertex Board 8

Vertex Board 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.7

Get Started →View Details

Flow Portal 8

Flow Portal 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.3

Try Free →View Details

Pilot Control 8

Pilot Control 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Pulse Builder 8

Pulse Builder 8 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.5

Try Free →View Details

Smart Suite 9

Smart Suite 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Labs Desk 9

Labs Desk 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Engine 9

Boost Engine 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.3

Get Started →View Details

AI One 9

AI One 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 3.9

Try Free →View Details

Prime Manager 9

Prime Manager 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Forge Drive 9

Forge Drive 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.1

Try Free →View Details

Vertex Portal 9

Vertex Portal 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Flow Core 9

Flow Core 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.3

Try Free →View Details

Pilot Kit 9

Pilot Kit 9 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 3.9

Get Started →View Details

Pulse Suite 10

Pulse Suite 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.5

Try Free →View Details

Smart Hub 10

Smart Hub 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Labs Cloud 10

Labs Cloud 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.7

Try Free →View Details

Boost One 10

Boost One 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

AI Board 10

AI Board 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 3.9

Try Free →View Details

Prime Studio 10

Prime Studio 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.5

Get Started →View Details

Forge Center 10

Forge Center 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.1

Try Free →View Details

Vertex Core 10

Vertex Core 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Flow Flow 10

Flow Flow 10 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.3

Try Free →View Details

Pilot Platform 11

Pilot Platform 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Pulse Hub 11

Pulse Hub 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.5

Try Free →View Details

Smart Works 11

Smart Works 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.1

Get Started →View Details

Labs OS 11

Labs OS 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Board 11

Boost Board 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

AI Portal 11

AI Portal 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 3.9

Try Free →View Details

Prime Control 11

Prime Control 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Forge Builder 11

Forge Builder 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.1

Try Free →View Details

Vertex Flow 11

Vertex Flow 11 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.7

Get Started →View Details

Flow Desk 12

Flow Desk 12 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.3

Try Free →View Details

Pilot Engine 12

Pilot Engine 12 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Pulse Works 12

Pulse Works 12 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free TierOpen Source⭐ 4.5

Try Free →View Details

Smart Manager 12

Smart Manager 12 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Get Started →View Details

Labs Drive 12

Labs Drive 12 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Paid: $12/month

Free Tier⭐ 4.7

Try Free →View Details

Boost Portal 12

Boost Portal 12 is a api tools platform for modern teams.

Best for: Teams that need scalable api tools workflows

Open Source⭐ 4.3

Get Started →View Details

💰 Stop Overpaying for SaaS

Join our weekly ToolSwitcher digest for free alternatives, cost-cutting playbooks, and curated tool deals.

🤖 Explore AI Tool Directory 🧠 Biohacking Newsletter Picks

Free forever. Unsubscribe anytime. No spam.