EngageRooms, cloud phone, and embeddable widgets
Workload + cost decision model
MediaSFU vs Retell
This page compares both options for teams evaluating AI voice operations, telephony depth, and whether to keep communications in a unified platform or split across services.
Interactive workload model
Model the workload. See the bill and what you can ship.
Start with a real scenario, then use exact minute inputs. Every result names the billing layer being compared so platform, carrier, and AI-provider costs do not get quietly mixed.
What you can buildTurn these minutes into a complete customer-contact workflow:
- Voice agents
- Human handoff
- Campaigns
- Transcripts + notes
- Web call widget
Comparison scopeAgent and voice infrastructure
Compares the always-on infrastructure layer before model, voice, telephony, and optional add-ons.
Estimated infrastructure delta$1,059 lower per month$12,702 per year; 26.5x cost ratio
Add the selected LLM, TTS voice, telephony route, and optional Retell add-ons; add the equivalent direct providers to MediaSFU.
Make the decision with evidence: test the workflow, inspect the controls, and replace the sample volume with your own procurement assumptions.
Estimates use MediaSFU list rates and the linked Retell AI published pricing available in July 2026. Review Retell AI pricing. Free allowances, negotiated discounts, taxes, carrier routes, AI model choices, storage, and optional services can change the final bill. This is a transparent planning model, not a vendor quote.
What the decision unlocks
Choose MediaSFU when the job is the whole communication workflow.
Use MediaSFU when one launch needs real-time rooms, phone calls, AI agents, translation, recording artifacts, widgets, and SDK control. Keep Retell in the shortlist when you are buying a dedicated AI phone-agent layer.
One connected operating modelFrom live interaction to usable output.
Launch the experience, run the workflow, retain the artifacts, and extend it with code when needed.
AutomateAI agents, campaigns, and live translation
CaptureRecordings, transcripts, notes, and summaries
ExtendSDKs, APIs, SIP, domains, and webhooks
Published starting rates
$0.10per 1K audio minutes
$0.375per 1K video minutes
$2+per 1K recording minutes
Unified launch plus developer control
Best when the product must be operated by real teams and extended by engineers.
voice-agent orchestration as a point solution
Best when that narrower center of gravity is the main buying reason.
LaunchMeetings, cloud phone, campaigns, widgets, rooms, notes, and recordings are usable without rebuilding the product surface.
ExtendSDKs, API keys, domains, SIP configs, provider keys, and webhooks remain available when engineering needs precision.
AuditCalls and sessions can produce logs, transcripts, AI notes, summaries, recordings, and downloadable artifacts.
Ask before choosing:
- Will non-developers run calls, campaigns, rooms, or notes after setup?
- Do phone, WebRTC, widgets, AI, translation, and recording need to work as one flow?
- Are you comparing total workflow cost instead of one isolated API line item?
When MediaSFU is usually a fit
- You need AI calls plus meetings, telephony, and widget surfaces.
- You are minimizing architecture sprawl and integration overhead.
- You prefer one platform for roadmap expansion beyond voice.
When Retell is usually a fit
- Your roadmap is focused primarily on AI calling only.
- You are comfortable assembling additional communication tools externally.
- You want a dedicated voice-agent-first operational model.
MediaSFU advantage
The stronger comparison is the complete workflow.
Against Retell, MediaSFU is most compelling when the buyer needs live media, phone calls, AI workflows, translation, recordings, and usable apps to work together without forcing every team into a developer-only rollout.
Launch from guided apps
Use meeting rooms, Lite Dashboard, cloud phone, AI campaigns, managed numbers, and built-in AI notes/transcripts where the plan includes managed MediaSFU services.
Keep provider and SDK control
Bring SIP providers, AI keys, widgets, domains, API keys, webhooks, and SDK integrations while still relying on MediaSFU for the room, media, telephony, and workflow surface.
01
Translated audio, not just captions
Participants can speak naturally while MediaSFU plays translated room audio. A French speaker can be heard in German, and listeners can keep or override their output language.
02
Phone, AI, and human handoff together
Inbound and outbound calling, managed numbers, AI receptionists, callback flows, and human handoff use one operating model instead of a stitched call stack.
03
A complete meeting product surface
SDK-backed meetings can include screen share, messaging, polls, whiteboard, breakout rooms, widgets, recordings, and room controls without starting from bare media primitives.
04
Recordings become review assets
Recording workflows support pause/resume, playback, transcripts, AI notes, summaries, and downloadable artifacts for review, compliance, or customer follow-up.
05
Ready apps plus developer control
Operators can use meetings, cloud phone, AI campaigns, and Lite Dashboard flows. Developers still get APIs, SDKs, webhooks, SIP configs, widgets, and provider-key control.
06
Plain SIP/PSTN stays plain
When calls do not use AI, MediaSFU positions the workload around audio infrastructure plus your carrier/provider path, not an extra WebRTC/SIP bridge billing layer.
Pricing lensAudio, video, and recording rates in readable units
Use these as MediaSFU-side inputs before comparing vendor-specific bundles, add-ons, or carrier charges.
| Workload | Dollars | Cents | 1K minutes | How to read it |
|---|---|---|---|---|
| Audio transport | $0.0001/min | 0.01¢/min | $0.10 per 1K min | Use for audio rooms and plain SIP/PSTN media transport. |
| Video transport | $0.000375/min | 0.0375¢/min | $0.375 per 1K min | Use for video infrastructure comparisons before add-on services. |
| Recording - audio only | $0.002/min | 0.2¢/min | $2 per 1K min | Audio-only recording derived from the recording purchase factors. |
| Recording - video SD | $0.006/min | 0.6¢/min | $6 per 1K min | Baseline SD video recording minute pricing. |
| Recording - video HD/FHD/QHD | $0.012 - $0.024/min | 1.2¢ - 2.4¢/min | $12 - $24 per 1K min | HD, FHD, and QHD video recording scale by recording quality. |
| Category | MediaSFU | Retell |
|---|---|---|
| Core platform scope | Unified meetings, calling, SIP/PSTN, AI agents, and widgets | Voice-agent orchestration focused platform |
| Telephony integration posture | Cloud phone and SIP/PSTN guidance in the same stack | Voice-call workflow focus with external stack decisions |
| Beyond voice workflows | Meetings, translation, and embeddable communication surfaces | Primarily optimized for AI calling experiences |
| Deployment style | Mix of low-code widgets and developer APIs | Developer-centric voice workflow composition |
| Cost strategy framing | Cost-focused all-in platform narrative | Voice platform economics depend on selected model stack |
| Typical team fit | Teams consolidating communication tooling across surfaces | Teams centered on AI calling as primary product requirement |
Assumptions behind the benchmark
| Variable | Benchmark baseline | Why it matters |
|---|---|---|
| Traffic profile | Recurring inbound/outbound AI call workloads | Real production mix matters more than pilot snapshots. |
| Provider stack | Chosen STT, LLM, and TTS providers for your flows | Different providers shift latency, quality, and total cost. |
| Feature breadth | Need for meetings, widgets, and telephony in addition to AI calls | Breadth can change platform fit and architecture complexity. |
| Operational requirements | Monitoring, compliance, and escalation in production | Ongoing operations cost can exceed initial implementation effort. |
Sources and validation links
Validate with vendor pricing pages and your own workload assumptions before final selection.
Last updated: July 13, 2026