Rate Limits & Free Tier Usage

This document explains how rate limits work on LangDB, especially for free-tier accounts, and how to remove them.

Free Tier Limits

LangDB’s free tier is intended for light experimentation and evaluation. The following limits apply:

Model Restrictions

• Without adding credits, access to certain models is restricted.

API Call Limit

• 100 LLM calls per day

• Applies across all models accessed via the LangDB Gateway

• Once the limit is exceeded, requests will fail until the daily quota resets

IP-Based Enforcement

• On the free tier, rate limits are enforced per IP address

• This means:

  • If one free account exceeds the daily limit from a server or machine

  • Other free accounts making requests from the same IP may also be blocked

• This behavior is intentional to prevent abuse of the free tier via multiple accounts

Note: This IP-based restriction applies only to free-tier accounts.

Removing Limits by Adding Credits

Adding credits to a LangDB account immediately removes all free-tier restrictions.

After a Top-Up

• No daily API call limit

• No IP-based rate limiting

• Full access to all available models through the gateway

• Suitable for demos, staging, and production workloads

There is no mandatory monthly subscription. You can add a one-time custom top-up and use credits on a pay-as-you-go basis.

Signup Credits

• New accounts currently receive 0.10 USD in signup credits

• Earlier accounts may have received higher signup credits (for example, 10 USD)

• The current signup credit amount is intentional and may change in the future