Synthflow
Build AI voice agents that answer and make phone calls, without writing code.
About
Synthflow is a no-code platform for building AI voice agents that handle inbound and outbound phone calls: appointment booking, lead qualification, customer support, and follow-ups. A drag-and-drop flow builder, CRM and calendar integrations, and custom API actions let teams ship a working agent in under an hour, according to multiple reviewers.
The product earns warm marks (G2 4.5/5 from 1,000+ reviews) but the buying experience changed sharply in 2026: independent pricing checks from September 2026 report the old $29-$899 self-serve plans retired in favor of sales-led Enterprise contracts starting around $30,000 a year. The company reports $30M in funding and 65M+ calls handled — vendor figures — with SOC 2, HIPAA, GDPR, and ISO 27001 readiness claimed for enterprise buyers.
What it can do
- No-code drag-and-drop voice agent builder
- Inbound and outbound AI phone calls
- CRM, calendar, and ticketing integrations
- Custom API actions with OAuth support
- SIP, Twilio, and bring-your-own-carrier telephony
- Voice cloning and 50+ languages (vendor-claimed)
- Agent testing sandbox
- SOC 2, HIPAA, GDPR, ISO 27001 readiness (vendor-claimed)
Setup
- Contact Synthflow sales for an Enterprise plan (self-serve plans were retired in 2026).
- Design your agent's conversation flow in the drag-and-drop builder.
- Connect your CRM, calendar, and telephony (SIP, Twilio, or bring your own carrier).
- Test calls in the sandbox and tune prompts and voices.
- Launch inbound/outbound calling and monitor call analytics.
Prerequisites
An Enterprise contract (from ~$30k/yr per 2026 pricing checks); phone numbers/carrier setup; CRM access for integrations.
Use cases
Works with
Trust score — 7/10
Scored 7/10 (TIER metrics, metrics-v1). Evidence: G2 4.5/5 from 1,000+ reviews and Trustpilot ~4.4/5 (cloudtalk.io review, 2026); $30M funding and 65M+ calls handled are vendor/reviewer-reported (fahimai review); September 2026 pricing checks (getmacha.com; cloudtalk.io) document the shift to enterprise-only contracts from ~$30k/yr. Docs corroboration: official site now shows enterprise-only pricing page. Strengths: strong review base; genuinely fast setup per reviewers. Docked for: (1) pricing transparency collapsed — no published rates or self-serve path; (2) low-star reviews cluster on support and stability. License: proprietary SaaS.
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 7.0/10
- Maintenance · recency, releases, issue load
- 7.0/10
- Openness · license + docs
- 5.0/10
- Manual review · sanity read + red-flag check
- 7.0/10
- · G2 4.5/5 from 1,000+ reviews, Trustpilot ~4.4/5 (cloudtalk.io 2026 review)
- · $30M funding and 65M+ calls handled are vendor/reviewer-reported (fahimai)
- · Sept 2026 pricing checks (getmacha.com; cloudtalk.io): self-serve plans retired, enterprise-only contracts from ~$30k/yr
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.