/developer-saas-apis

A curated list of APIs to help you build SaaS apps faster, smarter, and easier.

MIT LicenseMIT

🚀 Awesome Developer SaaS APIs

A curated list of APIs to help you build SaaS apps faster, smarter, and easier.
Save hours of research — focus on building amazing products.

📚 Categories

🛡️ Authentication APIs

  • Auth0 — Enterprise-grade identity platform. Free tier available.
  • Clerk — Full-stack authentication and user management. Generous free plan.
  • Supabase Auth — Open-source auth with Postgres integration.
  • Magic.link — Passwordless login APIs for apps and websites.

💳 Payment APIs

  • Stripe — The industry standard for online payments.
  • Paddle — Payments, subscriptions, and taxes for SaaS companies.
  • LemonSqueezy — Easy payments, subscriptions, and tax management.
  • Chargebee — Subscription billing and revenue operations.

📧 Email APIs

  • SendGrid — Reliable transactional and marketing emails.
  • Postmark — Lightning-fast transactional emails.
  • Resend — Modern email API for developers. (Free plan available)
  • Mailgun — Powerful APIs for transactional and marketing emails.

☁️ Storage APIs

  • AWS S3 — Scalable object storage in the cloud.
  • Cloudinary — Media management and optimization.
  • Uploadcare — File uploads, transformations, and delivery.

📱 Notifications APIs

  • Twilio — SMS, voice, and video APIs for communication apps.
  • OneSignal — Push notifications, in-app messaging, and emails.
  • Pusher — APIs for real-time apps (chat, notifications, etc.).

🧩 Background Jobs / Cron APIs

  • EasyCron — Cron job service, no server required.
  • Trigger.dev — Background jobs directly in your codebase.
  • Qovery CronJobs — Scheduled jobs with serverless infrastructure.

🔍 Logging & Monitoring APIs

  • Sentry — Real-time error tracking for modern apps.
  • LogRocket — Frontend monitoring and session replay.

🎛️ Feature Flag APIs

  • LaunchDarkly — Feature management platform for teams.
  • Flagsmith — Open-source feature flagging service.

📈 Analytics APIs

  • PostHog — Open-source product analytics suite.
  • Plausible Analytics — Privacy-friendly analytics.
  • Umami — Simple, fast, privacy-focused web analytics.

🌟 Why use this list?

  • Save hours searching for the right service
  • Focus on building features, not boilerplate
  • Discover new tools and hidden gems
  • Most options have generous free tiers to start with!

🛠️ Contributing

Found an awesome API that should be on this list?
Feel free to open a Pull Request! ✨

📜 License

Released under the MIT License.

Made to help developers build faster.