comparison · hermes vs synthflow
Hermes vs Synthflow in 2026: Pricing, Agency Features, and Who Each Platform Is Actually Built For
By builders, for builders.
If you are an AI voice agency operator comparing Hermes and Synthflow in mid-2026, the most important fact to know first: Synthflow raised a $20 million Series A and pivoted upmarket toward enterprise BPO. Their agency plan is now $3,400 per month. Hermes was built specifically for the operator who wants to run 3 to 20 voice AI client workspaces without needing enterprise IT resources, a procurement process, or a six-figure annual contract. The comparison below is honest and specific. Synthflow is a capable platform for large enterprise deployments. It is no longer the right tool for most AI voice agency operators.
Disclosure: this comparison is written by the Hermes team. We have tried to use accurate, verifiable pricing and feature data for Synthflow as of mid-2026. If anything here is out of date, email us and we will update it.
Side-by-side: Hermes vs Synthflow
| Feature | Hermes | Synthflow |
|---|---|---|
| Agency plan pricing | $699/mo (Agency, 20 workspaces) | $3,400/mo (Agency tier, as of mid-2026) |
| Starter plan pricing | $149/mo (3 workspaces) | Not publicly available at agency scale |
| Included minutes | 300 (Starter) / 1,000 (Business) / 2,000 (Agency) | Varies by enterprise contract |
| Overage rate | $0.24/min | Enterprise contract pricing |
| Workspaces (client isolation) | 3 / 7 / 20 by plan | Enterprise tier; limited agency multi-tenancy |
| White-label portal | Yes, CNAME-bound, included on all plans | Yes on higher tiers, enterprise positioning |
| Built-in CRM | Yes, per workspace | No native CRM |
| Outbound campaigns | Native campaign engine, included | Via API, not native for agency use |
| Agency billing management | Per-workspace P&L, native | Not a core feature at current positioning |
| Target customer (2026) | AI voice agency operators (3 to 20 clients) | Enterprise BPO and large call centers |
| Reported p50 latency | 600ms to 900ms | 600ms to 1,000ms (enterprise configs vary) |
| HIPAA BAA | Available on Business and Agency plans | Available on enterprise contracts |
| Agency-friendly support | Founder-direct for beta operators | Enterprise CSM model |
| Best for | Agency running 3 to 20 voice AI clients | BPO / enterprise deploying at scale with IT resources |
The pricing gap is not a rounding error
At $3,400 per month for Synthflow's agency tier versus $699 per month for Hermes Agency, the difference is $2,701 per month, or $32,412 per year. For an agency operator running 10 clients at $500 per month each ($5,000/mo revenue), Synthflow's pricing consumes 68 percent of gross revenue before you pay for anything else. Hermes at $699 per month plus a realistic $300 in overage is 20 percent of that same revenue. That 48-point gross margin difference is the business.
The Synthflow pricing is not arbitrary. Enterprise BPO organizations running 500,000 minutes per month and needing SLA guarantees, dedicated infrastructure, and legal contracts can justify $3,400 per month as a small fraction of their cost structure. An agency running 10 clients with 100 minutes each per month cannot. Synthflow is not trying to serve you anymore. That is not a criticism; it is a strategic choice. Hermes is the platform built for who you are.
Where Synthflow still wins
Synthflow has a longer track record, more enterprise case studies, and a compliance posture (SOC 2 reporting, enterprise MSAs, dedicated infrastructure) that large BPO buyers require. If you are building an AI voice operation at 100+ seats with enterprise procurement and a legal team reviewing contracts, Synthflow is a legitimate choice and is worth evaluating. Hermes is not enterprise-grade in that sense: no SOC 2 certification yet (roadmap item for late 2026), no dedicated infrastructure SLAs, and founder- direct support rather than a named enterprise CSM.
Where Hermes wins for agency operators
The operational layer that agency operators need is not in Synthflow's roadmap anymore. Workspace-level client isolation, per-workspace billing P&L so you see your margin per client, a built-in CRM for contact management across workspaces, and a native outbound campaign engine for follow-up and re-engagement sequences: these are agency operations features, not enterprise BPO features. Hermes was designed around this workflow from the start. The white-label demo page at your CNAME, the 72-hour onboarding timeline, and the $149 entry price all reflect a deliberate choice to build for the operator, not the enterprise.
See also: Hermes vs Vapi and the Synthflow deep-dive for more context on both platforms.
Best for: quick summary
Hermes is best for:
AI voice agency operators running 3 to 20 client workspaces who want a single platform for agents, CRM, campaigns, white-label, and billing without enterprise pricing or enterprise overhead.
Synthflow is best for:
Enterprise BPO organizations and large call centers with dedicated procurement, IT resources, and six-figure annual contracts who need SOC 2 compliance and dedicated infrastructure SLAs.
FAQ
What is Synthflow?
Synthflow is an AI voice agent platform that raised a $20 million Series A in late 2024 and has since pivoted its go-to-market toward enterprise buyers and BPO (business process outsourcing) organizations. Synthflow originally built an agency-facing product and had a white-label reseller program, but as of mid-2026 its Agency plan starts at $3,400 per month, and its feature roadmap has shifted toward enterprise compliance, SSO, audit logs, and large-volume BPO workflows. Individual agency operators running 3 to 20 clients are no longer Synthflow's target customer.
What is Hermes?
Hermes is the operating platform for AI voice agencies. It is purpose-built for the operator running 3 to 20 client workspaces: each client gets an isolated workspace with its own agents, contacts, CRM, campaigns, and billing. Hermes is not a BPO platform or an enterprise tool. It is designed for the agency owner who wants to deploy, manage, and bill voice AI clients without duct-taping together 5 to 7 separate tools. Hermes Starter is $149 per month (3 workspaces, 300 included minutes). Business is $399 per month (7 workspaces, 1,000 minutes). Agency is $699 per month (20 workspaces, 2,000 minutes). All plans include white-label demo pages, a built-in CRM, and the outbound campaign engine.
Why did Synthflow become so much more expensive?
Synthflow's pricing shift from agency-accessible to enterprise-only followed its Series A fundraise and a strategic decision to pursue higher-ACV contracts. BPO organizations and enterprise buyers pay $50,000 to $200,000+ per year for voice AI infrastructure, which is a fundamentally different business than charging agencies $200 to $500 per month. The math works for Synthflow's investors; it does not work for agency operators. The practical result: if you are an agency owner who built on Synthflow in 2024 or early 2025 and is looking for an alternative, Hermes is the next-generation agency-specific platform that Synthflow used to be positioning toward.
Does Hermes have the same voice quality and latency as Synthflow?
Hermes runs on the same underlying voice infrastructure providers (ElevenLabs, Deepgram, and compatible Retell and VAPI voice pipelines) as most platforms in this category. Reported p50 latency for Hermes is 600ms to 900ms depending on configuration and model selection; Synthflow in enterprise mode reports similar ranges. For agency use cases where the target is natural, low-latency conversation without enterprise-level SLA guarantees, Hermes performance is comparable to Synthflow at a fraction of the price. The meaningful differences are in the agency operations layer, not in the underlying voice models.
Can I migrate from Synthflow to Hermes?
Yes. The typical migration path: export your prompt configurations and knowledge base content from Synthflow (both are text, so no proprietary format lock-in), recreate them in Hermes workspaces, forward your existing client phone numbers to Hermes (or port them with standard LNP). For agencies running 5 to 15 clients, the migration typically takes 5 to 10 business days. Hermes does not charge a migration fee. Contact the team at buildwithhermes.com or apply at /beta and mention migration in your application to get priority onboarding.
Hermes: built for agencies Synthflow left behind
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