Parloa vs Sierra AI (2026)
Comparing Parloa and Sierra AI? Both are Enterprise 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 pricing and an estimated monthly bill, channels, compliance claims, and integrations, plus when each is the better fit, so you can pick on the facts rather than either vendor's own sales page.
At a glance
| Attribute |
 Parloa
|
 Sierra AI
|
|---|---|---|
| What it is | AI Agent Management Platform focused on natural, human-sounding phone automation for contact centers. | AI agent mirrors the nuances of human communication, ensuring seamless and organic customer service interactions while improving customer satisfaction. |
| Pricing | Paid · Custom | Per resolution · Custom |
| Est. monthly cost | No published price to estimate | No published price to estimate |
| Founded | 2018 | 2023 |
| Categories | Contact Center & CCaaS Enterprise Voice & Phone AI | AI Agents & Chatbots Enterprise Voice & Phone AI |
| Channels | ||
| Chat | ✓ | ✓ |
| — | ✓ | |
| Voice | ✓ | ✓ |
| SMS | — | ✓ |
| — | ✓ | |
| Compliance (vendor-claimed) | ||
| SOC 2 | ✓ | ✓ |
| HIPAA | — | ✓ |
| GDPR | ✓ | ✓ |
| ISO 27001 | ✓ | ✓ |
| PCI DSS | — | ✓ |
| FedRAMP | — | ✓ |
| ISO 42001 | — | ✓ |
| EU AI Act | — | ✓ |
| Data residency | North America, Europe, Asia-Pacific | Not verified |
| Languages | 130+ languages | 59 languages |
| What the AI can do | ||
| Takes actions | ✓ | ✓ |
| Hands off to a human | ✓ | ✓ |
| Choice of LLM | Not verified | Not verified |
| Buying | ||
| Free trial | Not verified | Not verified |
| How you buy | Not verified | Not verified |
| Minimum commitment | Volume package commitment (custom) | — |
| Company | Independent, venture-backed | Independent, venture-backed |
| Works with | Genesys Amazon Connect Twilio Salesforce Zendesk ServiceNow | Salesforce Zendesk Shopify Twilio Stripe Snowflake |
| Key features |
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| Next step |
Full listing Visit site → |
Full listing Visit site → |
Estimates assume 5,000 conversations a month, 60% handled by AI and 10 agent seats, at each vendor's published list price (the cost calculator's model); treat them as a floor, not a quote. Compliance rows are what vendors publicly claim, and “Not verified” means we have not confirmed that fact yet, not that the tool lacks it.
Choose Parloa or Sierra AI?
Choose Parloa if
Best for: High-volume enterprise contact centers whose hardest channel is the phone and want natural-sounding voice agents in 130+ languages, with tooling to simulate, test and release agent fleets, outcome-based pricing, hosting in North America, Europe or Asia-Pacific and SOC 2, GDPR and ISO 27001 coverage.
- you prefer a flat subscription to usage-based billing
Look elsewhere if you are a small team or want published pricing: Parloa is enterprise-only and quote-priced with a volume commitment, and its verified channels are voice and chat, not email.
Choose Sierra AI if
Best for: Large brands that want one branded agent deployed across chat, voice, email, SMS and WhatsApp, with voice agents that can take a payment mid-call, outcome-based pricing, 59 languages and the broadest compliance list in the directory including FedRAMP, ISO 42001 and the EU AI Act.
- you need autonomous AI agents
- you need Email, SMS, and WhatsApp coverage
- you need a vendor that publicly claims HIPAA, PCI DSS, and FedRAMP
- you would rather pay per resolved ticket than per seat
Look elsewhere if you are not an enterprise: Sierra sells multi-year contracts by quote with no trial or self-serve start, and its verified facts do not include a stated data residency.
About Parloa
Parloa is an enterprise platform built for the hardest support channel of them all: the phone. It focuses on natural-sounding, low-latency voice agents that can actually hold a conversation, and it wraps them in what it calls an AI Agent Management Platform, tooling to build, simulate, test, and safely release fleets of agents at contact-center scale. Though voice is its heart, Parloa has grown multimodal, extending the same agents to chat, WhatsApp, and Microsoft Teams, always aimed at high-volume enterprise contact centers rather than small teams.
The founders come by their voice obsession honestly. Parloa was started in 2018 in Berlin by Malte Kosub and Stefan Ostwald, who had previously built voice experiences and were among the first developers in Germany to create applications for Amazon's Alexa. That head start on talking machines shows up in a product designed to make phone automation feel human instead of robotic.
Investors have noticed in a big way. Parloa became one of Germany's newest unicorns in 2025 and then roughly tripled its valuation to around three billion dollars in early 2026, all while surpassing fifty million dollars in annual recurring revenue, a remarkable clip for a company automating something as unglamorous as inbound calls. Its commercial model is outcome-based, so customers pay for successfully resolved conversations rather than per minute or per seat, and a handoff to a human does not trigger the full charge.
Enterprises like Allianz, Booking.com, HealthEquity, SAP, and Decathlon trust it with serious call volumes across insurance, travel, and well beyond. Pricing is sales-led and geared toward large organizations handling hundreds of thousands of calls a year. If your support pain is concentrated squarely on the phone and you want AI that sounds genuinely natural even at massive scale, Parloa is a specialist built precisely for that particular fight.
Read the full Parloa listing → · See Parloa alternatives →
About Sierra AI
Sierra builds conversational AI agents for the enterprise, and it arrived with about as much star power as a startup can carry. It was founded in 2023 by Bret Taylor and Clay Bavor, and if those names ring a bell it is because Taylor co-created Google Maps, served as CTO of Facebook and co-CEO of Salesforce, and currently chairs the board of OpenAI, while Bavor spent eighteen years at Google leading its virtual and augmented reality work. Company lore says the whole thing was hatched over a grilled branzino lunch in Palo Alto.
The product lives up to the pedigree. From a single build, Sierra deploys a branded agent across chat, voice, email, SMS, and even ChatGPT, following your policies, adopting your brand's voice, and escalating gracefully when a conversation gets thorny. Its voice agents are a standout: they hold natural, low-latency conversations, read sentiment, and can even take a credit card or ACH payment over the phone in one uninterrupted call, with no clumsy handoff to a separate system.
Under the hood sits Agent OS, a platform for building, testing, and supervising agents, with tooling to run voice simulations and rehearse behavior before anything reaches a real customer. Pricing is outcome-based, tied to conversations or successful resolutions and wrapped in multi-year enterprise contracts, so Sierra is aimed at large brands rather than weekend experimenters. Reported customers include SoFi, Ramp, and Brex, and the company says its agents already serve a meaningful slice of the Fortune 50.
Sierra's fundraising has kept pace with its towering ambition, vaulting the company into the rarefied tier of the most valuable AI startups in barely two years. For enterprises that want polished, on-brand agents across every channel and are willing to invest the time and budget to do it properly, Sierra is a genuine marquee choice.
Read the full Sierra AI listing → · See Sierra AI alternatives →
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