Comparing Balto and PolyAI? Both are Contact Center & CCaaS and Voice & Phone AI tools in the directory, which is why buyers put them on the same shortlist. Below is a side-by-side look at how they price, what they integrate with, and when each is the better fit, so you can pick on the facts rather than either vendor's own sales page.
| Attribute | Balto | PolyAI |
|---|---|---|
| Pricing | Paid · Custom | Per resolution · Custom (per-minute) |
| Founded | 2017 | 2017 |
| Categories | Agent Assist & Copilots Contact Center & CCaaS Voice & Phone AI | Contact Center & CCaaS Enterprise Voice & Phone AI |
| Integrations | Five9 Genesys Cloud NICE CXone RingCentral 8x8 Salesforce | Salesforce HubSpot Zendesk Microsoft Dynamics OpenTable Zapier |
Balto puts the right words on the agent's screen while the call is still happening. Founded in 2017 in St. Louis by Marc Bernstein and Chris Kontes, it pioneered real-time guidance for contact centers: dynamic checklists, objection responses, and compliance language that appear mid-conversation, exactly when needed, rather than in a coaching session three weeks later. In industries like collections, insurance, healthcare, and home services, where certain sentences are legally required and certain mistakes are expensive, that immediacy is the whole product.
The platform has grown around that core into real-time QA that scores every call as it happens, AI coaching that spots which behaviors need work, live compliance monitoring with manager alerts, and Togo, Balto's voice AI agents for the repetitive calls, like scheduling and account verification, that never needed a human. It integrates with the major contact-center platforms, including Five9, Genesys Cloud, NICE CXone, RingCentral, and 8x8.
Balto raised a $37.5 million Series B led by Stripes in 2021, with RingCentral's venture arm participating, bringing total funding to roughly $52 million, and remains one of the flagship companies of the St. Louis tech scene, with customers like Humana, GEHA, Nelnet, NewRez, and Staples Canada. Pricing is quote-based; there is no public price list.
Choose Balto when what is said on live calls carries real regulatory or revenue weight. Pure digital-support teams will find better fits elsewhere in this directory, but if your operation runs on phone conversations where compliance phrasing and in-the-moment guidance decide outcomes, Balto's real-time focus is still the sharpest in the category.
Read the full Balto listing → · See Balto alternatives →
PolyAI answers the phone. While most of this directory started with chat and added voice later, PolyAI has been voice-first since three Cambridge machine-learning PhDs, Nikola Mrkšić, Pei-Hao Su, and Tsung-Hsien Wen, founded it in London in 2017 out of the university's Machine Intelligence Lab. Its agents are known for sounding genuinely human and for surviving the things that break lesser systems: interruptions, accents, background noise, and callers who change their mind mid-sentence. Restaurants, hotels, banks, and utilities use it to answer every call instantly, day and night, with customers like PG&E, UniCredit, Golden Nugget, and Fogo de Chao on the roster.
The platform matured into what the company calls an agentic dialog platform: Agent Studio for building and managing agents without code, a developer kit for deeper work, and Raven, a proprietary conversation model trained on more than a billion enterprise conversations. Compliance boxes (SOC 2, HIPAA, PCI) are ticked, which matters because taking payments and health information over the phone is exactly where voice AI earns its keep.
Investors have noticed the wedge. In December 2025 PolyAI raised an $86 million Series D at a valuation around $750 million, with NVIDIA's venture arm participating, bringing total funding past $200 million. Commercially it bills on usage, priced per minute of conversation, with rates scoped to your call volume rather than published on the site.
Choose PolyAI when the phone is your problem. If most of your support pain is hold music, missed calls, and staffing the night shift, a voice-native specialist will beat a chat-first platform's bolted-on telephony, and PolyAI is one of the most proven voice specialists in the market.
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