Head to head
ElevenLabs Agents vs Synthflow
Written By Research Team
AI Outbound Calling
Fact Checked
All pricing verified against vendor documentation
Updated
Higher score
ElevenLabs Agents
Best-in-class voice quality with the most predictable tier pricing — but low concurrency for campaigns.
ElevenLabs publishes a complete tier table from a free plan up to $990/mo, and $0.080/min is easy to reason about. Voice quality is the category benchmark. The problem for outbound specifically is concurrency: even the $990/mo Business tier allows only 40 concurrent calls, and exceeding your limit triggers burst pricing at double rate. For a serious outbound campaign that ceiling arrives fast.
Synthflow
Enterprise-only voice AI with ISO 27001 and EU hosting — and a $30,000 annual floor.
Synthflow has moved upmarket and now sells enterprise contracts only, starting at $30,000 per year. To its credit it publishes that floor, which most sales-gated vendors will not do. The compliance stack is the strongest here alongside Bland — SOC 2, HIPAA, GDPR and ISO 27001, with EU or US hosting. But there is no self-serve path at all: you cannot place a test call without going through sales.
Side by side
| Criterion | ElevenLabs Agents | Synthflow |
|---|---|---|
| Overall score | 73/100 | 69/100 |
| Rank | #6 | #8 |
| Type | Autonomous AI agent | Autonomous AI agent |
| Pricing model | Published | Sales-gated |
| Headline cost | $0.080/min; plans from free to $990/mo Business | Enterprise contracts start at $30,000 annually |
| Concurrency | 4 to 40 depending on tier — the lowest ceiling in this review | Custom concurrency planning with routing and escalation paths |
| Free trial | Free tier with 15 minutes and 4 concurrent calls | None |
| Certifications | BAAs for HIPAA customers (Enterprise) | SOC 2, HIPAA, GDPR, ISO 27001, EU and US hosting options, MSA/DPA support |
Score by criterion
| Criterion | Max | ElevenLabs Agents | Synthflow |
|---|---|---|---|
| Pricing transparency | 20 | 18 | 8 |
| Outbound capability | 20 | 13 | 15 |
| Compliance & security | 20 | 10 | 19 |
| Integrations & extensibility | 15 | 11 | 14 |
| Time to first call | 15 | 15 | 4 |
| Scale & reliability | 10 | 6 | 9 |