Helicone was a popular one-line LLM proxy for cost and request logging. After its acquisition by Mintlify (2026) it moved to maintenance mode — security and model updates only. As one bake-off put it: "If you want to understand why your agent made a decision, Helicone can't help you." If you're choosing where to go next and you need decision-level visibility and audit evidence — not just request logs — here's an honest comparison.
Helicone was a popular one-line LLM proxy for cost and request logging. After its acquisition by Mintlify (2026) it moved to maintenance mode — security and model updates only. As one bake-off put it: "If you want to understand why your agent made a decision, Helicone can't help you." If you're choosing where to go next and you need decision-level visibility and audit evidence — not just request logs — here's an honest comparison.
Last updated: July 4, 2026
| Capability | Helicone | AIAgentree |
|---|---|---|
| Decision traces — reasoning as structured artifacts | HTTP request logs | |
| Structured justifications (deliberation steps, policies) | ||
| Tamper-evident audit trail | ||
| EU AI Act Article 12 logging alignment | ||
| Article 14 human oversight / approval workflows | ||
| Outcome tracking (attempt vs result, 3 horizons) | ||
| Precedent search across past decisions | ||
| Audit-fit retention (≥6 months, Art. 19) | Tiered / limited | |
| Pricing predictability | Free → paid tiers | Flat trace tiers |
| EU data residency | Limited | EU (Germany) |
| Self-host posture | Self-host (multi-service) | Self-host option |
| Framework coupling | Proxy (language-agnostic) | Framework-agnostic |
| OpenTelemetry support | Partial | |
| MCP + A2A native endpoints | ||
| Latency impact | Proxy in critical path | <10ms async, no proxy |
| Actively developed (not maintenance mode) | ||
| One-line proxy setup | SDK (3–10 lines) | |
| Agent decision depth (why, not just what) |
Teams that just need simple cost and request tracking on an existing deployment and aren't ready to migrate. As a maintenance-mode tool, it's a fine place to keep an existing lightweight setup running — not to build something new on.
Anyone standing up a new production dependency, who needs agent-decision depth (why a decision was made, not just which requests fired) and audit-grade evidence for EU AI Act, SOC 2, or HIPAA contexts.
Helicone's own users asked for tamper-evident logs — cryptographic proof that records weren't altered — explicitly citing 'EU AI Act, SOC2, HIPAA' (GitHub issue #5645). A proxy that sees HTTP traffic can't provide that; it never sees the agent's reasoning.
AIAgentree captures the decision itself — reasoning, alternatives, and human sign-off — and seals it into a tamper-evident record with audit-fit retention. That's the evidence Article 12 expects, and the demand file for it is already public.
Migration is concrete: swap the base-URL proxy for the async SDK (3–10 lines). Instead of intercepting traffic, the SDK observes decisions — no proxy in your critical path, and no dependency on a maintenance-mode service.
Keep cost-tracking parity by emitting token/usage as decision attributes, and export your Helicone data before it ages out of retention. You can run both briefly during cutover if you want a clean overlap.
Not shutting down — it's in maintenance mode after the Mintlify acquisition, meaning security and model updates only, not active feature development. That's a reason many teams avoid building a new production dependency on it.
Yes — emit token counts and usage as decision attributes and you get cost visibility alongside the decision context, without a proxy in your request path.
Helicone's proxy sits in your critical path and sees HTTP requests. AIAgentree's SDK observes decisions asynchronously (<10ms typical impact) and captures the reasoning a proxy never sees — it doesn't intercept your traffic.
For basic setups, swapping the proxy for the SDK is a few lines. Full production migration with approval workflows and validation typically takes days, not weeks.
Export it before it ages out of retention. You can import cost/usage history as context and start sealing new decisions in AIAgentree immediately.
Keep the tools you like. Add tamper-evident decision records auditors accept — free to start.