Agent Jig
Agent Jig provides agent testing/evaluation.
50 agent evaluations/mo
Active · verified 2026-07-17
Usage-based free AI tiers
AI providers with recurring free request, token, minute, storage, or compute allowances.
60 providers · source-backed records with verification dates
Agora
Realtime voice, video, conversational AI, avatar, and streaming infrastructure for interactive applications.
10K minutes/mo + 300 minutes
Active · verified 2026-07-17
AI Studios (DeepBrain)
Video creation platform using AI avatars, dubbing and translation; provides web studio and limited API.
3 videos/mo + 16 credits
Active · verified 2026-07-17
Amazon Polly
AWS text-to-speech service offering natural sounding voices and multiple languages; integrated with AWS ecosystem.
5.0M characters/mo + 1.0M characters/mo for 12 months
Active · verified 2026-09-19
Amazon Transcribe
Automatic speech recognition service that transcribes audio to text and provides analytics.
60 minutes/mo for 12 months
Active · verified 2026-07-17
Anthropic (Claude)
LLM-based conversational AI models (Claude family) with API access for text generation and reasoning tasks.
Free tier
Active · verified 2026-07-17
Arize AX / Phoenix
Arize AX / Phoenix provides AI/agent evaluation and observability.
25K spans/mo + 1 GB/mo
Active · verified 2026-07-17
AssemblyAI
Speech recognition API that provides transcription, summarization and audio intelligence services with generous free usage.
$50 credit
Active · verified 2026-07-17
AWS Activate / Amazon Bedrock
AWS program providing startups with credits and technical support; includes Amazon Bedrock generative AI services.
Up to $200K credit
Active · verified 2026-07-17
Baseten
Serverless GPU platform for deploying and scaling AI models with a usage-based pricing model.
Free tier
Active · verified 2026-07-17
Braintrust
Braintrust provides AI gateway, observability, evaluation, and prompt tooling.
$10 credit/mo + 1 GB/mo
Active · verified 2026-07-17
Browserless
Browserless provides browser agents and automation.
1K units/mo
Active · verified 2026-07-17
Cartesia
Cartesia provides speech, voice, and voice agents.
$1 credit/mo + 20K credits/mo
Active · verified 2026-09-19
Cloudflare Workers AI
Serverless AI inference service running on Cloudflare's global edge network, with access to open-source models.
10K neurons/day
Active · verified 2026-07-17
Cohere
Provides generative language models, embeddings, and reranking services via API with evaluation and production keys.
1K requests/mo
Active · verified 2026-07-19
Composio
Composio provides agent tools, integrations, and tool routing.
100K tool calls/mo + 50K triggers/mo
Active · verified 2026-07-17
Future AGI
Future AGI provides agent evaluation, simulation, observability, gateway, and guardrails.
2K credits/mo + 100K requests/mo
Active · verified 2026-07-17
Galileo
Galileo provides AI evaluation, observability, and reliability.
5K traces/mo
Active · verified 2026-07-17
Gladia
Gladia provides speech-to-text and voice agents.
10 hours/mo
Active · verified 2026-07-17
GMI Cloud
GPU cloud service focusing on affordable AI inference; offers free access to select LLM endpoints.
Free tier
Active · verified 2026-07-17
Google AI Studio (Gemini)
Gemini models accessible through Google AI Studio offer text and multimodal generation; integrates with Vertex AI for production.
Free tier
Active · verified 2026-07-17
Google Cloud Speech-to-Text
Cloud speech recognition API supporting multiple languages and audio encoding formats.
60 minutes/mo
Active · verified 2026-07-17
Google Cloud Text-to-Speech
Generates natural-sounding speech from text using Google's deep learning models.
4.0M characters/mo + 1.0M characters/mo
Active · verified 2026-09-19
Helicone
Helicone provides LLM observability, gateway, caching, and prompt/evaluation tooling.
10K requests/mo
Active · verified 2026-07-17
HeyGen
AI video generator with avatars and translation capabilities; offers both web UI and API.
3 videos/mo
Active · verified 2026-07-17
HoneyHive
HoneyHive provides AI evaluation and observability.
10K events/mo
Active · verified 2026-07-17
IBM Watson Speech-to-Text
IBM's speech recognition service supporting real-time and batch transcription.
500 minutes/mo
Active · verified 2026-09-13
IBM Watson Text-to-Speech
Text-to-speech service with various voices and expressive options.
10K characters/mo
Active · verified 2026-09-13
Inference.net
Serverless API platform for generative models offering both free and paid tiers.
1.0M requests/mo + 1.0M spans/mo
Active · verified 2026-07-17
JigsawStack
JigsawStack provides a multi-model AI API platform.
1.0M tokens/mo
Active · verified 2026-07-17
Kling AI
Kling AI is a text-to-video platform with free access and optional referral bonuses; current recurring credit terms are not publicly established.
Free tier
Active · verified 2026-07-17
Langfuse
Langfuse provides LLM evaluation, tracing, observability, and prompt management.
50K units/mo
Active · verified 2026-07-17
LangSmith
LangSmith provides AI observability, evaluation, agent tooling, and sandboxes.
5K traces/mo
Active · verified 2026-07-17
LiveKit
LiveKit provides open-source and cloud infrastructure for real-time voice and video agents.
1K agent session minutes/mo + $2.5 credits
Active · verified 2026-07-17
Maxim AI
Maxim AI provides agent evaluation, observability, and prompt management.
10K logs/mo
Active · verified 2026-07-17
Mem0
Mem0 provides agent memory and personalization.
10K requests/mo + 1K requests/mo
Active · verified 2026-07-17
Milvus (Zilliz Cloud)
Open-source vector database with cloud service (Zilliz Cloud) for high-scale retrieval and similarity search.
5 GB
Active · verified 2026-07-17
Mistral AI (Experiment plan)
French LLM provider Mistral AI offers an experimental plan for developers to try its LLMs with rate-limited free usage.
Free tier
Active · verified 2026-07-19
Novita AI
Generative AI platform providing image and video generation APIs.
Free tier
Active · verified 2026-07-17
NVIDIA NIM
NVIDIA's generative AI microservices platform providing hosted models via API for text and speech tasks.
Free tier
Active · verified 2026-07-17
OCR.space
OCR.space provides OCR/document conversion.
25K requests/mo
Active · verified 2026-07-17
OpenAI
Provides GPT family of language models, embeddings, image generation (DALL-E) and speech models via APIs.
Free tier
Active · verified 2026-07-17
OpenRouter
OpenRouter is a unified API platform that provides developers with access to a wide variety of large language models from multiple providers through a standardized interface, simplifying integration and optimizing model usage.
50 requests/day
Active · verified 2026-07-17
Parea AI
Parea AI provides AI evaluation, observability, human review, and prompt management.
3K logs/mo
Active · verified 2026-07-17
Photoroom API
Photoroom API provides image editing/background removal as a sandbox allowance.
1K calls/mo + 10 calls
Active · verified 2026-07-17
Portkey
Portkey provides AI gateway, observability, prompt management, and guardrails.
10K logs/mo
Active · verified 2026-07-17
Qdrant
Open-source vector database with a managed cloud offering for scalable embeddings and search.
Free tier
Active · verified 2026-07-17
remove.bg
remove.bg provides background removal/computer vision.
50 images/mo
Active · verified 2026-07-17
Replicate
Replicate is a model marketplace and inference platform where developers can run open-source and proprietary AI models via web or API. Select models can be run for free for a limited number of runs before billing is required.
Free tier
Active · verified 2026-07-17
Runpod
Cloud platform providing on-demand GPUs, serverless compute and multi-node clusters for AI workloads.
$1K credit
Active · verified 2026-07-17
Scaleway Generative APIs
European cloud provider offering generative API endpoints for open-source models with generous free tier.
1.0M tokens + 60 minutes
Active · verified 2026-07-17
SERP Search
SERP Search provides search APIs and agent retrieval.
1K requests/mo
Active · verified 2026-07-17
Sightengine
Sightengine provides visual/text moderation, synthetic-media detection, and safety APIs.
2K operations/mo
Active · verified 2026-07-17
Synthesia
Generative video platform offering AI avatars, dubbing and voiceovers for business communication.
10 minutes/mo
Active · verified 2026-07-17
Traceloop
Traceloop provides LLM/agent observability and evaluation.
50K spans/mo
Active · verified 2026-07-17
Upstage (Solar)
Korean AI company providing Solar LLM and related APIs for text generation and chat.
$10 credit
Active · verified 2026-07-17
Vercel AI Gateway
API gateway for LLMs enabling request routing and caching across multiple model providers, integrated with the Vercel platform.
Free tier
Active · verified 2026-07-17
Veryfi
Veryfi provides document capture, OCR, and structured extraction.
100 documents/mo
Active · verified 2026-07-17
Weaviate
Open-source vector database that can be self-hosted or used through Weaviate Cloud Service (WCS).
1K requests/mo
Active · verified 2026-07-17
Weights & Biases Weave
Weights & Biases Weave provides AI evaluation, tracing, and experiment tracking.
1 GB/mo + 5 GB/mo
Active · verified 2026-07-17
Common questions
What is a usage-based free AI tier?
It is a recurring allowance of requests, tokens, minutes, storage, or compute. The free quantity and reset period vary by provider. The directory records each allowance with a source link when a numeric limit is available.