Flagsmith vs Helicone

Flagsmith

Helicone

Flagsmith · 14 features

• A/B Testing — Multivariate flag splits.
• Audit Log — Full history of flag changes.
• Change Requests — Approval workflow for flag changes.
• Edge API — Global low-latency flag eval.
• Feature Flags — Boolean + multivariate + JSON flags.
• Local Evaluation — Server SDKs eval flags locally — no per-req API call.
• Percentage Rollouts — Gradual traffic ramp.
• Remote Config — Non-boolean config values.
• Role-Based Access — Fine-grained permissions.
• Scheduled Flags — Time-based flag changes.
• Segments — Rule-based targeting.
• Self-Hosting — Docker/Helm install.
• SSO + SAML — Enterprise SSO.
• Webhooks — Outbound event streaming.

Helicone · 16 features

• Alerts — Thresholds on error rate, latency, cost, usage. Pro+.
• Async Logging — Log AFTER the LLM call via SDK — zero added latency.
• Cost Tracking — Automatic cost calculation per call by provider/model.
• Dashboard — Request tables, aggregate metrics, cost breakdowns.
• Evaluators — LLM-as-judge + custom evaluators on runs.
• Experiments — A/B test different models/prompts.
• HQL (SQL over traces) — Query your logged data with SQL. Pro+.
• PII Redaction — Automatically scrub emails, credit cards, etc. from logs.
• Prompt Caching — Cache identical requests → save money.
• Prompts & Versions — Store + version + A/B test prompts.
• Proxy Mode — 1-line integration via base URL swap. Captures all requests.
• Rate Limiting — Per-user + per-key rate limit policies.
• Reports — Scheduled email reports with KPIs.
• Self-Hosting — Docker + k8s deployment.
• Sessions — Group related calls (chat sessions, agent runs).
• User Metrics — Per-user cost + usage segmentation.