Free: 3 transfers per month up to 1 GB each with verified email account. One transfer: from €2.50 (up to 1 GB), €3.50 (up to 10 GB), €5.50 (up to 100 GB), €9.50 (up to 1 TB). Basic: €9/month (first month €0.90), 20 credits monthly. Pro: €19/month (first month €1.90), 80 credits monthly. Extra credit
Key features
LLM trace logging with 40+ integrations
Automatic error detection and diagnostics
Ollie agent for code fix recommendations
Test Suites and 40+ LLM-as-a-judge evaluation metrics
Production dashboards and alerts for agents
Prompt playground and optimization
Agent Playground for local agent development
Cost intelligence for Claude Code and Codex tracking
End-to-end encryption with XChaCha20-Poly1305
One-time download only, then automatic destruction
Supports files up to 1 TB
Password protection included by default
Integration with Claude, Cursor and Claude Desktop
API key support for CI and scripts
Resumable uploads for large files
No readable file contents stored by service
What makes it different
Truly open-source platform with enterprise-grade infrastructure
Traces appear almost instantly even at high volumes
Flexible hosting options including self-hosted, cloud, and custom deployments
Easy integration with just a few lines of code
Opik automatically turns trace data and eval results into code fixes
Files encrypted on sender's device before upload
Automatic permanent destruction after one download
No recovery possible by design
Repeated wrong password attempts destroy the transfer
Comet
VitalSend™