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Open-source projects tagged “API”.

Inspect repositories, licenses, activity, and alternatives across the API ecosystem.

12 projects connectedTag matches come from repository topics and catalog metadata.
Public APIs
United StatesMIT

A collective list of free APIs

Developer ToolsOpen-source projects grouped in this category for discovery and comparison.2 projects#PythonProjects tagged with this topic in the verified catalog.3 projectsapiProjects tagged with this topic in the verified catalog.12 projectsapisProjects tagged with this topic in the verified catalog.1 projectContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives
↗ 209 recorded momentum↗ 209 recorded momentumRecorded star momentum from the latest GitHub metrics sync · snapshot Jul 29, 2026.Browse trending →
FreePricingFree and open sourceFree453.2K49.9K3 days ago
Alternatives toContentfulContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives+2
Neovim
United StatesLicense not declared

Vim-fork focused on extensibility and usability

Content & CollaborationOpen-source projects grouped in this category for discovery and comparison.1 project#Vim ScriptProjects tagged with this topic in the verified catalog.1 projectapiProjects tagged with this topic in the verified catalog.12 projectscProjects tagged with this topic in the verified catalog.1 projectContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives
↗ 1 recorded momentum↗ 1 recorded momentumRecorded star momentum from the latest GitHub metrics sync · snapshot Jul 29, 2026.Browse trending →
FreePricingFree and open sourceFree101.4K7K2 hours ago
Alternatives toContentfulContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives+2
FastAPI
United StatesMIT

FastAPI framework, high performance, easy to learn, fast to code, ready for production

Developer ToolsOpen-source projects grouped in this category for discovery and comparison.2 projects#PythonProjects tagged with this topic in the verified catalog.3 projectsapiProjects tagged with this topic in the verified catalog.12 projectsasyncProjects tagged with this topic in the verified catalog.1 projectContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives
↗ 38 recorded momentum↗ 38 recorded momentumRecorded star momentum from the latest GitHub metrics sync · snapshot Jul 29, 2026.Browse trending →
FreePricingFree and open sourceFree101K9.7K14 hours ago
Alternatives toContentfulContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives+2
Hoppscotch
MIT

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

InfrastructureOpen-source projects grouped in this category for discovery and comparison.2 projects#TypeScriptProjects tagged with this topic in the verified catalog.5 projectsGithub ActionsProjects tagged with this topic in the verified catalog.7 projectsJavaScriptProjects tagged with this topic in the verified catalog.7 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.4 self-hosted optionsPostmanProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
Free–CustomPricingFree open source; Hoppscotch Cloud / Enterprise availableFree–Custom79.8K6K29 hours ago
Alternatives toPostmanPostmanProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives+1
Strapi
FranceLicense not declared

🚀 Strapi is the leading open-source headless CMS. It’s 100% JavaScript/TypeScript, fully customizable, and developer-first.

Data & AnalyticsOpen-source projects grouped in this category for discovery and comparison.3 projects#TypeScriptProjects tagged with this topic in the verified catalog.5 projectsGithub ActionsProjects tagged with this topic in the verified catalog.7 projectsJavaScriptProjects tagged with this topic in the verified catalog.7 projectsSanityProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
Free–CustomPricingFree Community; Cloud and Enterprise availableFree–Custom72.7K9.8K29 hours ago
Alternatives toSanitySanityProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives+1
Meilisearch
FranceLicense not declared

A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.

AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.4 projects#RustProjects tagged with this topic in the verified catalog.1 projectGithub ActionsProjects tagged with this topic in the verified catalog.7 projectsBashProjects tagged with this topic in the verified catalog.7 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.4 self-hosted optionsAI-nativeThis project includes AI-native capability signals in the catalog metadata.4 AI-native projectsElasticSearchSearch and analytics engine with commercial distributions.1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
Free–CustomPricingFree open source; Cloud plans availableFree–Custom58.6K2.6K30 hours ago
Alternatives toElasticSearchElasticSearchSearch and analytics engine with commercial distributions.1 alternative+3
Insomnia
Apache-2.0

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

InfrastructureOpen-source projects grouped in this category for discovery and comparison.2 projects#TypeScriptProjects tagged with this topic in the verified catalog.5 projectsGithub ActionsProjects tagged with this topic in the verified catalog.7 projectsJavaScriptProjects tagged with this topic in the verified catalog.7 projectsPostmanProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree39.9K2.4K27 hours ago
Alternatives toPostmanPostmanProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives+1
Directus
United StatesLicense not declared

The flexible backend for all your projects 🐰 Turn your DB into a headless CMS, admin panels, or apps with a custom UI, instant APIs, auth & more.

Data & AnalyticsOpen-source projects grouped in this category for discovery and comparison.3 projects#TypeScriptProjects tagged with this topic in the verified catalog.5 projectsGithub ActionsProjects tagged with this topic in the verified catalog.7 projectsJavaScriptProjects tagged with this topic in the verified catalog.7 projectsWordPressPopular CMS with proprietary hosted offerings.1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
Free–CustomPricingFree open-source core; Cloud and Enterprise availableFree–Custom36.5K4.8K26 hours ago
Alternatives toWordPressWordPressPopular CMS with proprietary hosted offerings.1 alternative+2
Skyvern
AGPL-3.0

Automate browser based workflows with AI

AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.4 projects#PythonProjects tagged with this topic in the verified catalog.3 projectsGithub ActionsProjects tagged with this topic in the verified catalog.7 projectsJavaScriptProjects tagged with this topic in the verified catalog.7 projectsAI-nativeThis project includes AI-native capability signals in the catalog metadata.4 AI-native projectsBrowserbaseProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree22.3K2.1K26 hours ago
Alternatives toBrowserbaseBrowserbaseProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative+1
Bitwarden
United StatesLicense not declared

Bitwarden infrastructure/backend (API, database, Docker, etc).

Data & AnalyticsOpen-source projects grouped in this category for discovery and comparison.3 projects#C#Projects tagged with this topic in the verified catalog.1 projectGithub ActionsProjects tagged with this topic in the verified catalog.7 projectsJavaScriptProjects tagged with this topic in the verified catalog.7 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.4 self-hosted options1PasswordProprietary password manager for individuals and teams.1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree19.4K1.7K26 hours ago
Alternatives to1Password1PasswordProprietary password manager for individuals and teams.1 alternative+3
Apache APISIX
Apache-2.0

The Cloud-Native API Gateway and AI Gateway

AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.4 projects#LuaProjects tagged with this topic in the verified catalog.1 projectai-gatewayProjects tagged with this topic in the verified catalog.1 projectapiProjects tagged with this topic in the verified catalog.12 projectsAI-nativeThis project includes AI-native capability signals in the catalog metadata.4 AI-native projectsContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree16.9K2.9K36 hours ago
Alternatives toContentfulContentfulProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…2 alternatives+2
Maxun
AGPL-3.0

🔥 The open-source no-code platform for web scraping, crawling, search and AI data extraction • Turn websites into structured APIs in minutes 🔥

AI & Machine LearningOpen-source projects grouped in this category for discovery and comparison.4 projects#TypeScriptProjects tagged with this topic in the verified catalog.5 projectsJavaScriptProjects tagged with this topic in the verified catalog.7 projectsNodeJSProjects tagged with this topic in the verified catalog.7 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.4 self-hosted optionsAI-nativeThis project includes AI-native capability signals in the catalog metadata.4 AI-native projectsOctoparseProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
Metrics syncingMetrics syncingStar momentum for this project has not landed in the latest GitHub metrics sync yet. Check trending for repositories with recorded momentum.Browse trending →
FreePricingFree and open sourceFree16.5K1.4K26 hours ago
Alternatives toOctoparseOctoparseProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…1 alternative
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