AssemblyAI vs Helicone

AssemblyAI

Helicone

AssemblyAI · 11 features

• Advanced Prompting — Streaming with disfluency + code-switching + realtime diarization.
• Audio Intelligence — Sentiment, topic detection, summarization, entity detection, content safety, IAB…
• Auto Punctuation — Smart capitalization + punctuation.
• Keyterm Prompting — Boost accuracy for domain vocabulary.
• LeMUR (LLM framework) — Run LLMs over transcripts: Q&A, summary, action items.
• Medical Mode — Specialized for clinical + medical vocabulary.
• PII Redaction — Auto-redact credit cards, SSNs, addresses, emails.
• Pre-recorded Transcription — Upload audio/video URL or file → transcript.
• Realtime Streaming — WebSocket-based low-latency STT.
• Speaker Diarization — Identify who spoke when.
• Webhooks — Auto-notify when transcription finishes.

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.