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APIs & Integrations

Payments, messaging, customer data, and integration platforms. 19 tools reviewed by verified GitHub developers.

Editorial Top Picks

Pick #1 9.4

Stripe

Payments API that became the default for software companies

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Pick #2 9

Resend

Email API built for developers — React-Email, deliverability-first, polished DX

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Pick #3 9

Mux

Video infrastructure for developers — encoding, streaming, and analytics in one API

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All APIs & Integrations Tools

9.4
Stripe
APIs & Integrations

Payments API that became the default for software companies

84 verified
9
Resend
APIs & Integrations

Email API built for developers — React-Email, deliverability-first, polished DX

47 verified
9
Mux
APIs & Integrations

Video infrastructure for developers — encoding, streaming, and analytics in one API

43 verified
8.8
LiveKit
APIs & Integrations

Open-source WebRTC infrastructure for real-time audio, video, and data

38 verified
8.7
Postmark
APIs & Integrations

Transactional-email specialist with deliverability obsession and clean API

39 verified
8.6
Paddle
APIs & Integrations

Merchant of record for SaaS — handles tax, compliance, and global payments

42 verified
8.6
Cloudflare Stream
APIs & Integrations

Video encoding and delivery at Cloudflare edge — flat per-minute pricing

32 verified
8.5
Twilio
APIs & Integrations

SMS, voice, WhatsApp, email — communication APIs at scale

48 verified
8.5
Adyen
APIs & Integrations

Unified payments platform for global enterprises and high-volume merchants

36 verified
8.4
Hasura
APIs & Integrations

Instant GraphQL APIs over Postgres and other databases

27 verified
8.4
SendGrid
APIs & Integrations

Twilio-owned email infrastructure — the volume leader for transactional and marketing

61 verified
8.4
Daily
APIs & Integrations

Real-time video API for embedded calls, telehealth, and prebuilt experiences

27 verified
8.3
LemonSqueezy
APIs & Integrations

Merchant of record for digital products — lighter and faster than Paddle

31 verified
8.3
Agora
APIs & Integrations

Global real-time video and voice infrastructure with SDK breadth and low-latency network

30 verified
8.2
Segment
APIs & Integrations

Customer data infrastructure — one analytics SDK to send everywhere

36 verified
8.2
MessageBird
APIs & Integrations

European-origin SMS, WhatsApp, voice — strong on local carriers across Europe and APAC

29 verified
8
Mailgun
APIs & Integrations

Email API focused on developer flexibility, Sinch-owned, strong free tier

34 verified
7.8
Plivo
APIs & Integrations

Cost-optimized SMS and voice API — Twilio alternative with strong unit economics

23 verified
7.7
Vonage
APIs & Integrations

Enterprise communications API — formerly Nexmo, now part of Ericsson

21 verified

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Editorial best-of ranking for this category with weighting methodology and FAQ.

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