Most searches for a "Synthflow alternative" or a "Bland AI alternative" are really a question about how much you want to build. Synthflow, Bland and Retell are platforms: you design the agent, pick the voice and model, wire the telephony, and pay per minute of infrastructure. Hatch and Sonant are vertical products with the build done for you. RevStrike sits in the second group, for three verticals, and is priced as a service with a guarantee. Here is each one, factually, with the vendor's own site as the source and the date it was read.
The six, in one paragraph each
Synthflow (synthflow.ai, read 2026-10-08) is a no-code voice AI platform with a visual Flow Designer, 200+ integrations including HubSpot, Salesforce, Genesys and Zapier, and voice, SMS and chat channels. Its pricing page shows enterprise contracts "starting at $30,000 annually"; a pay-as-you-go tier is described on its blog ("starting at $0.08/min") but per-minute rates are not published on the pricing page. It states SOC 2, HIPAA, PCI DSS, GDPR and ISO 27001. Best for teams or agencies that will build and maintain agents across many use cases. Full comparison.
Bland AI (bland.ai, read 2026-10-08) is an enterprise voice AI platform with an API, a builder and a Forward Deployed Engineer path for large accounts, aimed at regulated industries. Published pricing: Start at $0.14 a minute with no platform fee and 10 concurrent calls, Build at $0.12 a minute plus $299 a month with 50 concurrent calls, transfers metered separately, Enterprise custom. It states SOC 2 Type I and II, HIPAA with BAA, GDPR, PCI DSS, FedRAMP and ISO 27001. Best for developers and regulated enterprises. Full comparison.
Retell AI (retellai.com, read 2026-10-08) is a voice agent platform with a drag-and-drop studio, APIs and SDKs, and voice, chat and SMS channels. Pricing is pay as you go, "$0.07 to $0.31 / min" assembled from voice infrastructure, TTS, LLM, telephony and add-ons, with $10 in free credits and 20 free concurrent calls. It states SOC 2 Type II, HIPAA, GDPR and ISO 27001. Best for builders who want granular control and a free start. Full comparison.
Hatch (usehatchapp.com, read 2026-10-08) is an AI communications platform for home services and home improvement: inbound voice AI, SMS and email "AI CSRs", journey campaigns and a multi-inbox, with native ServiceTitan booking and Yelp, Angi, Google LSA and Thumbtack lead sources. Yelp completed its acquisition of Hatch on February 2, 2026. Pricing is "platform fee plus usage" on annual agreements, by quote. Best for contractors who want text, email and inbound call handling in one workspace. Full comparison.
Sonant AI (sonant.ai, read 2026-10-08) is an AI receptionist for property and casualty insurance agencies. It answers inbound calls, triages, takes quote intake, books appointments and warm-transfers after checking the rep's calendar, with a certified Applied Epic integration plus EZLynx, HawkSoft, Momentum, QQCatalyst, Zapier, Calendly and Outlook. Inbound only. Pricing is a quoted "partner rate" with onboarding included. It states SOC 2 Type II and GDPR. Best for agencies whose problem is the inbound phone. Full comparison.
RevStrike (revstrike.ai) is a done-for-you AI voice agent for solar, pest control and insurance teams. It calls a company's own inbound leads within seconds (about 10 seconds), qualifies on the team's criteria, and either books on Google Calendar or Outlook or live-transfers to a rep with a whisper and press-1. It also works an existing customer book for add-ons and renewals. Phone calls only: no SMS, no email, and it does not answer inbound lines. Set up on one 45-minute onboarding call. Pricing is published: a $497 a month Fall Pilot with 1,000 minutes (2 of 3 spots left, at least one booked appointment in the first 30 days or a full refund, conditions apply) and a $5,000 a month Full Platform with 20,000 minutes, $0.30 a minute after. No SOC 2 report; compliance controls are on the trust page. Customers include Greenix and a national residential solar company.
Condensed comparison
| Synthflow | Bland AI | Retell AI | Hatch | Sonant AI | RevStrike | |
|---|---|---|---|---|---|---|
| Type | No-code platform + enterprise services | Developer platform + enterprise services | Builder + API platform | Vertical multichannel product | Vertical inbound receptionist | Vertical done-for-you agent |
| Setup | Build it yourself, or enterprise implementation | Self-serve; FDE team on enterprise (2 to 6 weeks) | Self-serve studio | Vendor builds it | Vendor builds it (under 30 days) | 45-minute call, live same day |
| Published pricing | Enterprise from $30,000/yr; PAYG rates not on pricing page | $0.14/min (Start), $0.12/min + $299/mo (Build) | $0.07 to $0.31/min, $10 free credits | Not published, by quote, annual | Not published, by quote | $497/mo (1,000 min) or $5,000/mo (20,000 min), $0.30/min after |
| Channels | Voice, SMS, chat | Voice, SMS, web | Voice, chat, SMS | Voice, SMS, email | Voice + mid-call texting | Phone only |
| Inbound / outbound | Both | Both | Both | Mostly inbound, plus campaigns | Inbound only | Outbound to your own leads and customers |
| Live transfer | Yes | Yes, metered | Yes, with briefing | Yes, warm | Yes, calendar-aware warm | Yes, whisper + press-1 |
| Calendar booking | Yes (Cal.com and others) | Yes, providers not named | Yes, providers not named | Yes, incl. ServiceTitan | Yes (Calendly, Outlook) | Google Calendar, Outlook native |
| Integrations | 200+ incl. HubSpot, Salesforce, Zapier | Not listed by name on homepage | Make, Twilio, Vonage, GoHighLevel, n8n, HubSpot | ServiceTitan, LeadPerfection, improveit 360, AccuLynx, Yelp, Angi, LSA, Thumbtack | Applied Epic, EZLynx, HawkSoft, Momentum, QQCatalyst, Zapier | Calendars native; CRMs via Zapier, webhook, CSV |
| Stated compliance | SOC 2, HIPAA, PCI, GDPR, ISO 27001 | SOC 2, HIPAA BAA, GDPR, PCI, FedRAMP, ISO 27001 | SOC 2 Type II, HIPAA, GDPR, ISO 27001 | "Compliance tools"; SOC 2 not published | SOC 2 Type II, GDPR | DNC, calling windows, recording, AI disclosure toggle, registered numbers. No SOC 2 |
| Verticals | Horizontal | Horizontal, regulated focus | Horizontal | Home services, home improvement | Insurance | Solar, pest control, insurance |
Review figures come from search summaries read on 2026-10-08; G2 and Capterra block automated reads, so confirm on the listing before relying on a number.
How to choose
- You have a builder or an agency partner and many use cases: Synthflow, Bland or Retell. Compare per-minute stacks, concurrency and the compliance letters you need.
- You are a contractor who wants texts, emails and inbound calls in one inbox: Hatch.
- You are an insurance agency drowning in inbound calls: Sonant.
- You sell solar, pest control or insurance and lose deals in the minutes after a lead comes in: RevStrike. The honest trade is that you give up SMS, a self-serve builder and SOC 2 in exchange for a phone agent that is live after one call and guaranteed to book.