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Best One API alternatives

AI tools that cover similar ground to One API, sorted by relevance. Use the table for a quick pricing and category check, then click through for details.

ToolPricingCategoriesBest for
LangGPTFreePrompts / AI Open SourceStructured prompt framework from China
易标 OpenBidKitFreeBid Writing / AI Open SourceOpen-source AI bid writing toolkit
魔搭 ModelScopeFreeArt Models / AI Open Platforms / Dev Communities / AI Open SourceAlibaba's open-source model community
SegmindFreemiumArt Models / AI APIsAPIs and serverless hosting for open image models
ModelsLabFreemiumArt Models / AI APIsAPI marketplace for image-generation models
fal.aiPaidVideo Models / AI APIsFast inference APIs for open video and image models
TextInFreemiumDocument AI / AI APIsScanKing maker's document parsing and OCR APIs
Label StudioFreemiumData Labeling / AI Open SourceMost popular open-source data labeling tool

How we picked these alternatives

We only include tools that share at least one category with One API. Ordering is relevance-based, not paid: featured tools first, then the rest of the category.

Free
LangGPT
LangGPT

Structured prompt framework from China

PromptsAI Open Source
Free
易标 OpenBidKit
易标 OpenBidKit

Open-source AI bid writing toolkit

Bid WritingAI Open Source
Free
魔搭 ModelScope
魔搭 ModelScope

Alibaba's open-source model community

Art ModelsAI Open Platforms
Freemium
Segmind
Segmind

APIs and serverless hosting for open image models

Art ModelsAI APIs
Freemium
ModelsLab
ModelsLab

API marketplace for image-generation models

Art ModelsAI APIs
Paid
fal.ai
fal.ai

Fast inference APIs for open video and image models

Video ModelsAI APIs
Freemium
TextIn
TextIn

ScanKing maker's document parsing and OCR APIs

Document AIAI APIs
Freemium
Label Studio
Label Studio

Most popular open-source data labeling tool

Data LabelingAI Open Source
Freemium
CVAT
CVAT

Open-source CV annotation industry standard

Data LabelingAI Open Source
Freemium
Cartesia
Cartesia

Ultra-low-latency Sonic TTS API built for real-time voice agents

Text to SpeechAI APIs
Freemium
Amazon Polly
Amazon Polly

AWS cloud TTS service with lifelike neural voices at scale

Text to SpeechAI APIs
Freemium
Deepgram
Deepgram

Fast, developer-favorite speech-to-text API for voice apps

Speech RecognitionAI APIs
Freemium
AssemblyAI
AssemblyAI

Speech-to-text API with built-in summarization and insights

Speech RecognitionAI APIs
Freemium
Speechmatics
Speechmatics

ASR known for top accuracy across accents and dialects

Speech RecognitionAI APIs
Freemium
Gladia
Gladia

French real-time speech-to-text API for voice-first products

Speech RecognitionAI APIs
Free
GPT-SoVITS
GPT-SoVITS

Open-source voice cloning star: few-shot cloning from seconds of audio

Voice CloningAI Open Source
Free
RIME 小狼毫
RIME 小狼毫

Open-source keyboard engine adored by geeks and power users

AI Input MethodsAI Open Source
Freemium
AnythingLLM
AnythingLLM

Open-source app to chat with your docs using any LLM

Knowledge BaseAI Open Source
Freemium
百川智能 Baichuan
百川智能 Baichuan

Baichuan open-source LLMs by Sogou founder Wang Xiaochuan

LLMsAI Open Source
Freemium
零一万物 01.AI
零一万物 01.AI

Kai-Fu Lee's 01.AI, maker of Yi open models

LLMsAI Open Source
Freemium
天工 Skywork
天工 Skywork

Kunlun's Skywork: prolific open-source LLM family

LLMsAI Open Source
Free
书生·浦语 InternLM
书生·浦语 InternLM

InternLM open LLMs from Shanghai AI Laboratory

LLMsAI Open Source
Free
LLaMA-Factory
LLaMA-Factory

Zero-code fine-tuning for 100+ open LLMs

Model TrainingAI Open Source
Freemium
Unsloth
Unsloth

2x faster LLM fine-tuning with 70% less VRAM

Model TrainingAI Open Source

More alternatives (34)

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