Helicone alternative for audit logs and spend tracking

If you want a Helicone alternative focused on audit logs and spend tracking, the best option depends on whether you want:

1. LLM observability only
2. Enterprise audit/compliance
3. Budget/spend analytics
4. A self-hosted solution

Good alternatives

1. Langfuse

• Strong for tracing, usage analytics, and cost tracking
• Open source and self-hostable
• Good if you want audit-style logs for prompts, responses, tokens, latency, and costs
• Better than Helicone if you want deeper observability and more control

2. OpenMeter

• Best if your main goal is usage metering and spend tracking
• Not LLM-specific, but works well for token-based billing/chargeback
• Good for internal cost accounting and customer usage reporting

3. Arize Phoenix

• Strong for LLM tracing and debugging
• Less focused on spend tracking than Helicone/Langfuse
• Good for model evaluation and observability

4. Braintrust

• Good for LLM evals, logging, and experiment tracking
• Useful if audit logs are tied to quality/testing workflows
• Cost tracking exists, but it’s not the main strength

5. OpenTelemetry + warehouse/dashboard

• If you need a true audit trail
• Send LLM events to your own logs, SIEM, or data warehouse
• Best for compliance-heavy environments
• More engineering effort, but maximum flexibility

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Best picks by use case

• Best overall Helicone alternative: Langfuse
• Best for spend tracking/billing: OpenMeter
• Best for compliance/audit trail: OpenTelemetry + your logging stack
• Best for evals + traces: Braintrust or Phoenix

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If you tell me these 3 things, I can narrow it down:

• Self-hosted or SaaS?
• Need compliance/audit logs for regulators, or just internal debugging?
• Do you need per-user / per-team cost allocation?