Synthflow vs telli — Pricing, Plans, and Verified Costs (2026)
Synthflow starts at $29/mo. telli uses custom pricing — request a quote to compare.
How pricing works
These two tools don't price the same way, so the headline numbers below aren't directly comparable until you plug in your own volume.
- Synthflow (Hybrid) — Synthflow is hybrid: a fixed subscription from $29/mo plus metered usage on top (Starter). Your real bill moves with volume, not seat count.
- telli (Per Usage) — telli bills purely on usage — Custom. There is no fixed per-seat fee, so the monthly cost depends entirely on how much you consume.
Per-minute, per-credit and per-token rates exclude any downstream model, speech or telephony costs unless the vendor states otherwise.
No-code AI voice agent builder with tiered subscriptions + per-minute overages. Starter $29 (50 min), Pro $99 (200 min), Growth $449 (1000 min), Agency $899 (2000 min), Enterprise custom (10K+ min). White-label option runs ~$2,000/mo. Voice engine alone ~$0.09/min; all-in $0.15–0.37/min with LLM + telephony.
AI voice call operations platform built for outbound sales agents. Serves solar, HVAC, healthcare, real estate, insurance, and financial services with human-like voice AI and auto-dialers. Three tiers (Starter, Scale, Enterprise) with usage-based per-minute billing — quote-only. Raised $3.6M seed 2025. Berlin-founded.
All plans compared
| Tier role | Plan | Synthflow monthly | Synthflow annual | telli monthly | telli annual |
|---|---|---|---|---|---|
| Entry paid | Starter / — | $29 | $29 | — | — |
| Mid tier 1 | Pro / — | $99 | $99 | — | — |
| Mid tier 2 | Growth / — | $449 | $449 | — | — |
| Pro / power | Agency / — | $899 | $899 | — | — |
| Enterprise | Enterprise / — | Custom | Custom | — | — |
Tier names differ across vendors. Rows are aligned by tier role, not name. Full tier structures on each tool's page.
What each is best for
Synthflow is worth it if… small businesses and agencies that want no-code AI voice agents without touching a developer platform like Vapi or Retell. Starter ($29) makes prototyping cheap.
telli is worth it if… outbound sales teams in appointment-heavy verticals (solar, home services, insurance) who want AI voice agents that dial and qualify at scale without hiring more SDRs. Pricing is opaque and quote-driven — expect setup support that varies by tier and per-minute rates that need negotiation.
Bottom line: Choose based on how you want to pay — Synthflow is hybrid, telli is per usage.
Choose Synthflow over telli if…
Choose Synthflow if…
- You're fine with a base subscription plus metered usage on top (from $29/mo).
- You match the profile Synthflow is built for: small businesses and agencies that want no-code AI voice agents without touching a developer platform like Vapi or Retell.
- You need a general-purpose voice agents & speech/audio option rather than a vertical-specific one.
Choose telli if…
- You want an outbound calling agent that ships with the playbook already built.
- You're a revenue team, not an engineering team, and want speed over stack control.
- You're calling leads in solar, HVAC, insurance, or other high-intent home-services verticals.
Feature comparison
| AI Voice Agents | Synthflow | telli |
|---|---|---|
| Bring-your-own LLM | Partial | — |
| Bring-your-own voice | Partial | |
| Multilingual (5+ languages) | ||
| Inbound + outbound | ||
| Human transfer | ||
| HIPAA | — | |
| SOC 2 | ||
| Self-serve signup | Partial |
Feature parity verified against vendor pricing and docs pages on September 10, 2026. Missing a feature? Tell us — we'll fact-check and update.
At a glance
| Synthflow | telli | |
|---|---|---|
| Free plan | No | — |
| Entry price | $29/mo | Custom |
| Enterprise available | Yes | — |
| Pricing model | Hybrid | Per Usage |
| Last verified | September 10, 2026 | September 10, 2026 |
| Full pricing | View full pricing | View full pricing |
Pricing last verified September 10, 2026. Tracked daily.