Sierra

Best-fit jobs

Customer-facing agents (chat/voice/SMS/email)

Best-fit businesses

Large enterprises only

Integration effort

Weeks to months, vendor-led

Featured listing

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What it really costs

Pricing model from the October 2026 comparison matrix. Figures marked (est.) are triangulated from secondary sources, not vendor-published; (secondary) figures come from secondary reporting.

Contact-sales; ~$1–$4/resolved conversation *(est.)*; ACVs ~$2.5M *(est.)*

From the research report

Landscape Report, October 2026 edition — §2.7.

White-glove enterprise platform for customer-facing AI agents (chat, voice, SMS, WhatsApp, email, even ChatGPT) — Sierra builds the agent with you rather than selling software. Customers: ADT, Sonos, WeightWatchers, SoFi, Cigna, Rivian, Discord. Who: large enterprises only; no SMB path. Pricing: unverified / contact-sales (pricing page 404s). Outcome-based: one teardown reports $1–$4 per resolved conversation (estimate); median ACVs ~$2.5M (estimate). Traction: $100M ARR in 21 months (company announcement, Nov 2025); $15.8B Series E, May 2026 (Tiger Global/GV). Integration: weeks to months, vendor-led. Gotchas: outcome definitions negotiated per contract — apples-to-apples comparison impossible.

Compliance flags

Before this goes live in your business

AI disclosure: tell callers and customers it's AI (EU law since Aug 2026; US best practice). Always keep a human-escalation path.

Source: AI Agent Comparison Matrix + Landscape Report (October 2026). Every price is dated to a source in the underlying research; vendor-reported figures are labeled as such.

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