AssemblyAI vs Windsurf
Best-in-class speech-to-text API — Universal models, 99 languages, low-latency streaming
vs. Agentic IDE (formerly Codeium) — Cascade AI flow + SWE-1.5 model
Pricing tiers
AssemblyAI
Free Credits
$50 in free credits on signup. Full API access.
Free
Pay-as-you-go
Per-hour billing by model. No minimum.
$0 base (usage-based)
Enterprise
Custom contracts. SLA, private deployments, BAA.
Custom
Windsurf
Free
Daily + weekly refresh of basic quota. Includes SWE-1.5 + Cascade (limited) + Tab.
Free
Light
Unlimited with daily + weekly refresh. Free higher quota tier.
$0 base (usage-based)
Pro
$20/month. All premium models. Fast Context. Usage billed at API price.
$20/mo
Teams
$40/user/month. Team + admin dashboard + RBAC.
$40/mo
Max
$200/month. Unlimited + all features.
$200/mo
Enterprise
Custom. Unlimited + SSO + SOC 2 + on-prem option.
Custom
Free-tier quotas head-to-head
Comparing free-trial on AssemblyAI vs free on Windsurf.
| Metric | AssemblyAI | Windsurf |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
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.
Windsurf · 13 features
- Bring Your Own Key — Use your OpenAI/Anthropic/Azure keys to bypass quotas.
- Cascade — AI agent flow with read/write tool use across files.
- Chat Panel — Sidebar chat with codebase context.
- Command (inline edit) — Ctrl/Cmd+I → natural language edits.
- Deploys — One-click deployment to Netlify + custom targets.
- Fast Context — Optimized context retrieval engine for codebase queries.
- Image Input — Drag screenshots into chat for context.
- MCP Support — Hook MCP servers for extended tools.
- Memories — Persistent notes Cascade can refer to.
- Previews — Live preview pane inside IDE for web apps.
- Tab Completions — Next-edit + inline completions, multi-cursor aware.
- Terminal Integration — Cascade reads + writes terminal. Confirms risky ops.
- .windsurfrules — Project-level system prompts.
Developer interfaces
| Kind | AssemblyAI | Windsurf |
|---|---|---|
| CLI | — | Windsurf CLI |
| SDK | assemblyai-go, assemblyai (Node), assemblyai (Python), assemblyai (Ruby) | — |
| REST | AssemblyAI REST API | — |
| MCP | — | MCP Support |
| OTHER | Streaming WebSocket, Webhooks | JetBrains / Xcode / Eclipse / Neovim Plugins, Windsurf Desktop App, .windsurfrules |
Staxly is an independent catalog of developer platforms. Outbound links to AssemblyAI and Windsurf are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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