# APICostCalc

> Free API cost calculators — compare pricing across 387+ LLM models and estimate real costs for chatbots, RAG pipelines, and AI agents. No signup. Calculations run client-side in the browser.

APICostCalc helps developers and teams answer "what will this actually cost?" before committing to an LLM, API stack, or architecture — comparing per-token pricing across providers and translating usage patterns into real monthly bills.

## Core calculators

- [LLM Token Cost Calculator](https://apicostcalc.com/llm-token-cost-calculator.html): What a single LLM call costs on GPT, Claude, Gemini, DeepSeek and more, ranked cheapest first.
- [LLM Price Comparison](https://apicostcalc.com/llm-price-comparison.html): Compare pricing across 387+ models from every major provider.
- [Chatbot Cost Calculator](https://apicostcalc.com/chatbot-cost-calculator.html): Estimate monthly cost for a chatbot by message volume and model choice.
- [RAG Cost Calculator](https://apicostcalc.com/rag-cost-calculator.html): Full monthly cost of a RAG pipeline — embeddings, retrieval, and generation.
- [AI App Cost Estimator](https://apicostcalc.com/ai-app-cost-estimator.html): Project total AI feature cost before you build it.
- [API Stack Cost Calculator](https://apicostcalc.com/api-stack-cost-calculator.html): Combine multiple API costs (LLM, payments, email, hosting) into one estimate.
- [Free API Tiers](https://apicostcalc.com/free-api-tiers.html): Directory of API free tiers across categories.

## Vendor comparison calculators

- [Context Compaction Cost Calculator](https://apicostcalc.com/context-compaction-cost-calculator.html): What long-running AI agents lose to re-summarizing context — the hidden 20-30% "agent tax".
- [AI Voice Agent Cost Calculator](https://apicostcalc.com/ai-voice-agent-platform-cost-calculator.html): Vapi vs Retell vs Bland.ai at your call volume, all-in cost per platform and breakeven points.
- [Fraud Detection API Cost Calculator](https://apicostcalc.com/fraud-detection-api-cost-calculator.html): Stripe Radar vs Sift vs Riskified vs Signifyd pricing at your order volume.
- [Axiom vs Better Stack vs Datadog Logs Cost Calculator](https://apicostcalc.com/axiom-vs-better-stack-vs-datadog-logs-cost-calculator.html): Log pricing shapes compared at your volume, retention window and index percentage.

## Other resources

- [AI APIs directory](https://apicostcalc.com/ai-apis.html): Pricing and setup guides for hundreds of developer APIs — AI/LLM, payments, email/SMS, data, maps, search.
- [Learn](https://apicostcalc.com/learn.html): How API pricing actually works — tokens, caching, rate limits, batch pricing.
- [Blog](https://apicostcalc.com/blog/): Cost-comparison posts and API pricing analysis.
- [Contact](https://apicostcalc.com/contact.html)

## Notes

All tools are free, require no signup, and run entirely in the browser — no data leaves the user's device. Pricing data is maintained manually against provider docs and can lag when providers change pricing.