OpenAI API alternatives
OpenAI API is developer platform for building with OpenAI models. If it is not the right fit on price, features or setup, these 10 tools do a similar job. We rank them by how closely they match OpenAI API, and every listing is checked against its official site.
Compare OpenAI API and its alternatives
| Tool | Best for | Pricing | Starts at | MCP server |
|---|---|---|---|---|
| OpenAI APIcurrent | Developers adding AI features to products | Paid | See site | Not checked |
| Promptitude | Teams managing prompts and content workflows | Free plan | 100K free tokens on sign-up | Not checked |
| Ollama | Developer teams running open models privately or on their own hardware | Open source | Free to run locally, cloud plans from $20/month (as of October 2026) | Not checked |
| Cursor | Engineering teams adopting agent-assisted coding | Free plan | Free Hobby plan, paid from $20/month (Individual), Teams $40/user/month (as of October 2026) | Not checked |
| LangChain | Engineering teams building and monitoring LLM agents | Open source | Framework free; LangSmith Developer free, Plus $39/seat/month plus usage (as of October 2026) | Not checked |
| Postman | Engineering teams building and managing APIs | Free plan | Free tier, paid from $9/month (Solo, billed annually) | Official |
| v0 | Developers and product teams prototyping web apps | Free plan | Free tier, Plus $30/user/month | Not checked |
| GitHub Copilot | Developer teams already on GitHub | Free plan | Free plan, Pro $10/month, Pro+ $39/month, Max $100/month; Business and Enterprise via sales (as of October 2026) | Official |
| Amazon Bedrock Guardrails | Teams building AI apps on AWS that need central safety policies | Paid | See site | Not checked |
| Arize AI | Teams monitoring and evaluating LLM agents in production | Free plan | Free AX plan, AX Pro $50/month, Enterprise custom (as of October 2026) | Not checked |
| Azure AI Content Safety | Teams on Azure and Microsoft Foundry moderating AI input and output | Free plan | See site | Not checked |
The alternatives
1. Promptitude
Platform to create, test and manage prompts and connect AI to business workflows.
Pricing: Free plan, from 100K free tokens on sign-up · Best for: teams managing prompts and content workflows · Also covers: gpt
2. Ollama
Run open models locally or in Ollama's cloud through one API.
Pricing: Open source, from Free to run locally, cloud plans from $20/month (as of October 2026) · Best for: developer teams running open models privately or on their own hardware
3. Cursor
AI code editor with coding agents, built by Anysphere.
Pricing: Free plan, from Free Hobby plan, paid from $20/month (Individual), Teams $40/user/month (as of October 2026) · Best for: engineering teams adopting agent-assisted coding
4. LangChain
Open-source framework for building LLM apps, with the LangSmith platform for monitoring and deployment.
Pricing: Open source, from Framework free; LangSmith Developer free, Plus $39/seat/month plus usage (as of October 2026) · Best for: engineering teams building and monitoring LLM agents
5. Postman
API platform for building, testing and documenting APIs, with built-in AI assistance.
Pricing: Free plan, from Free tier, paid from $9/month (Solo, billed annually) · Best for: engineering teams building and managing APIs
6. v0
Vercel's AI assistant for building web apps and UIs from text prompts.
Pricing: Free plan, from Free tier, Plus $30/user/month · Best for: developers and product teams prototyping web apps
7. GitHub Copilot
AI coding assistant in the IDE, CLI and GitHub, with agent mode and code review.
Pricing: Free plan, from Free plan, Pro $10/month, Pro+ $39/month, Max $100/month; Business and Enterprise via sales (as of October 2026) · Best for: developer teams already on GitHub
8. Amazon Bedrock Guardrails
Configurable safety filters for generative AI apps on AWS, usable with any model via the ApplyGuardrail API.
Pricing: Paid · Best for: teams building AI apps on AWS that need central safety policies
9. Arize AI
Agent observability and evaluation platform, with the open-source Phoenix for tracing and evals.
Pricing: Free plan, from Free AX plan, AX Pro $50/month, Enterprise custom (as of October 2026) · Best for: teams monitoring and evaluating LLM agents in production
10. Azure AI Content Safety
Microsoft's API for detecting harmful content, prompt attacks and ungrounded output in AI apps.
Pricing: Free plan · Best for: teams on Azure and Microsoft Foundry moderating AI input and output
Frequently asked questions
What is the best alternative to OpenAI API?+
Promptitude, Ollama and Cursor are the closest matches in our directory. Promptitude: Platform to create, test and manage prompts and connect AI to business workflows.
Is there a free alternative to OpenAI API?+
Promptitude, Ollama, Cursor and LangChain have a free plan or are open source. Free plans usually cap usage or features.
Is there an open-source alternative to OpenAI API?+
Yes: Ollama and LangChain.
What is OpenAI API?+
Developer platform for building with OpenAI models.
More alternatives