Alternatives to OnAPI
12 tools that compete with or replace OnAPI. Ranked by direct product-type match — not generic category overlap.
Agnes AI
Free multimodal API gateway from Singapore's Sapiens AI with in-house text, image, video and audio models behind OpenAI-compatible endpoints
TokenHot
Unified OpenAI-compatible API gateway for 97+ text, image, and video models at published discounts up to 90% off.
APIMart
APIMart is a discounted API gateway: one OpenAI-compatible endpoint for 500+ text, image, video, and audio models on pay-as-you-go credits.
GPTProto
GPTProto routes 200+ text, image, and video AI models through one OpenAI-compatible API key at up to 30% below official pricing.
Inference Engine by GMI Cloud
Multimodal AI inference platform with OpenAI-compatible APIs, dedicated GPUs, and day-zero frontier models like Qwen3.8-Max and Kimi K3.
novita.ai
Novita AI is the AI-native cloud for developers — 200+ open-weight models via one API, an Agent Sandbox, and per-second H200/H100 GPUs.
PoYo.AI
PoYo.AI puts 122+ video, image, music, chat, and 3D models behind one async API at 20-75% below official rates
Modellix
One REST API that routes 170+ AI image, video, audio, and 3D models with public per-unit pricing and full per-call logs.
APIDot
One async API key for image, video, chat, music, and 3D models at per-generation pay-as-you-go prices.
Legnext
Legnext is a REST API for Midjourney image and video generation — no Discord account or Midjourney subscription required.
HiAPI
One API key for image, video, audio, and text generation — with durable artifact links on every task.
Frequently asked questions
What are the best alternatives to OnAPI?
We currently list 12 alternatives to OnAPI: Agnes AI, TokenHot, APIMart, GPTProto, Inference Engine by GMI Cloud. Each is ranked by direct product-type match rather than generic category overlap.
How do you choose which OnAPI alternatives to show?
Alternatives are ranked by direct product-type match — tools that do the same job — not by shared category tags. Every listed tool is independently re-verified on a continuous cycle.