Free llm chatbot stack

3 roles3 with no end date1 of 3 need no card

01 LLM API

The model behind the replies.

Google

Gemini API free tier

Flash models, free of charge

No cardNo end date

• PriceFree of charge input and output (Flash)
• Rate limitsRPM, TPM and RPD per project
• ResetDaily quota resets at midnight Pacific

Swap LLM API

Google Gemini API free tierGroq GroqCloud Free planCloudflare Workers AI free allocationHugging Face Inference Providers credits

02 Runtime

Streams replies to the browser.

Vercel

Vercel Hobby

100 GB transfer a month

Card ?No end date

• Edge requests1M / month
• Data transfer100 GB / month
• Deployments100 / day

Swap Runtime

Vercel Vercel HobbyCloudflare Workers Free planRender Render Free instances

03 Conversation store

History and per-user memory.

Upstash

Upstash Redis Free

500K commands a month

Card ?No end date

• Data size256 MB
• Commands500K / month
• Bandwidth10 GB / month

Swap Conversation store

Upstash Upstash Redis FreeTurso Turso Free planNeon Neon Free planSupabase Supabase Free plan

Limits side by side

LLM API

Google Gemini API free tier

PriceFree of charge input and output (Flash)Rate limitsRPM, TPM and RPD per projectResetDaily quota resets at midnight PacificData useFree-tier content used to improve Google productsBatch, FlexNot available on free tierSign up

Runtime

Vercel Hobby

Edge requests1M / monthData transfer100 GB / monthDeployments100 / dayProjects200Blob storage1 GB / monthSign up

Conversation store

Upstash Redis Free

Data size256 MBCommands500K / monthBandwidth10 GB / monthDatabases1Sign up

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