App AI Gatewayappaigateway.com
Proxy that lets iOS apps call AI providers without exposing keys, verified with App Attest.
- No card
1,000 requests/mo
AI model APIs
27 services
Free inference tiers are limited by requests per minute and per day, and the numbers change often. Google AI Studio allows 20 requests a day and 5 a minute on Flash models, and 14,400 requests a day on Gemma. OpenRouter offers some open models at no cost with rate limits, onomeo allows 60 requests per 5 hours across 35 free models, and Gonka Broker includes 1M tokens a month. Pollinations.AI generates images without an account. Prompts sent on free tiers may be used to improve the provider's models, so read the data terms before sending anything sensitive.
27 services
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Arize AXarize.com
Tracing and evaluation platform for LLM apps and agents, with self-hosted Phoenix option.
- No card
25,000 spans/mo
1 GB ingestion/mo, 15-day retention, Unlimited users
Braintrustbraintrustdata.com
LLM evaluation suite with a prompt playground and dataset management.
1,000 eval rows/wk
Brave Search APIbrave.com
Web, news, image and video search API from an independent index, usable for RAG.
$5 credit/mo
Future AGIfutureagi.com
Open-source evals, tracing, agent simulation and guardrails for LLM apps.
- Open source
100,000 gateway requests/mo
50 GB storage, 2,000 eval credits, Unlimited seats
Gonka Brokergonkabroker.com
OpenAI-compatible inference for open models running on a decentralized GPU network.
1M tokens/mo
Google AI Studioby Google Cloud Platform
Browser workspace and API keys for prototyping with Gemini and Gemma models.
20 requests/day (Flash)
5 requests/min (Flash), 14,400 requests/day (Gemma)
Hugging Facehuggingface.co
Hub for sharing ML models and datasets, with hosted inference and training tools.
30,000 input chars/mo
Keywords AIkeywordsai.co
LLM gateway with monitoring that routes calls to hundreds of models through one API.
10,000 requests/mo
Langfuselangfuse.com
Open-source tracing, prompt management and evals for debugging LLM applications.
- Open source
50,000 observations/mo
LangWatchlangwatch.ai
LLMOps monitoring and evaluation with DSPy-based prompt optimization.
- Open source
1,000 traces/mo
1 DSPy workflow
Latitudelatitude.so
MIT-licensed tracing and evaluation for AI agents running in production.
- Open source
20,000 credits/mo
30-day retention, Unlimited seats
Lumenfall.ailumenfall.ai
OpenAI-compatible gateway to image generation models with provider failover.
Unlimited FLUX.1 schnell images
Maxim AIgetmaxim.ai
Evaluation, simulation and observability for LLM agents, including a prompt playground with BYOK.
10,000 logs/mo
3 seats
Mediaworkbench.aimediaworkbench.ai
Workspace for chatting with Azure OpenAI, DeepSeek and Gemini models, including images.
100,000 words
onomeoonomeo.com
Single OpenAI-format key for many models, usable from Cline, SillyTavern or Open WebUI.
35 free models
60 requests per 5 hrs
Portkeyportkey.ai
AI gateway with request logging and observability for generative AI apps.
10,000 requests/mo
Tavily AItavily.com
Web search API built for research tasks, returning organized results for apps and agents.
- No card
1,000 requests/mo
telemetry.devtelemetry.dev
OpenTelemetry tracing for LLM apps recording tokens, cost, latency and tool calls.
- No card
10,000 spans/mo
7-day retention, 1 project, 2 seats
Transcript LOLtranscript.lol
Audio and video transcription with LLM summaries, from uploads or social media links.
2 transcriptions/day
Azure Cognitive Servicesby Microsoft Azure
Prebuilt AI APIs for vision, translation, speech, face analysis and bots.
Limits not listed
Comet Opikcomet.com
Open-source tool for tracing, testing and evaluating LLM applications.
- Open source
Limits not listed
Composiocomposio.dev
Tool integrations and auth layer that connects AI agents to 200+ apps.
Limits not listed
OpenRouteropenrouter.ai
Unified API for many LLMs, some open models offered at no cost with rate limits.
Limits not listed
Pollinations.AIpollinations.ai
Open-source image generation API callable without an account or key.
- No sign-up
- Open source
Limits not listed
ReportGPTreportgpt.app
AI writing assistant for drafting reports using your own model API key.
Limits not listed
Wolfram Languagewolfram.com
Cloud access to the Wolfram Language and its curated computational knowledge.
Limits not listed