API Infrastructure Open Source Tools

Alternative toCourier

Open source notification infrastructure for product teams

• 40,175 GitHub stars
• MITLicence MIT

Alternative toContentful

Wrap any SQL database with REST and GraphQL APIs and an admin UI

• 38,631 GitHub stars

Alternative toPinecone

Self-hosted vector database for AI similarity search and RAG

• 35,154 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Database

Alternative toMem0

Add persistent user memory to any LLM app via API, Apache 2.0

• 31,339 GitHub stars
• MITLicence MIT
• #AI Agents

Alternative toAmazon DynamoDB

Popular open source NoSQL document database for modern apps

• 28,651 GitHub stars
• #Database

Alternative toAlgolia

Fast typo-tolerant search engine with instant results

• 27,014 GitHub stars
• GPL-3.0Licence GPL-3.0

Alternative toMongoDB Atlas

Open source distributed document database with real-time feeds

• 26,994 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Database

Alternative toPlanetScale

Edge SQLite database with multi-tenancy for serverless apps

• 24,878 GitHub stars
• MITLicence MIT
• #Database

Alternative toAWS Step Functions

Durable workflow orchestration for reliable, long-running apps

• 23,857 GitHub stars
• MITLicence MIT

Alternative tocommercetools

Open source headless e-commerce platform with GraphQL API

• 23,459 GitHub stars
• BSD-3-ClauseLicence BSD-3-Clause