Who uses Sierra?
Conversational AI agent platform for enterprise customer service across chat, voice, email and messaging. sierra.ai
50
companies use Sierra
50 companies use Sierra. 10% are in Fintech & Payments. Confirmed or observed customers include SoftBank, Uber, and Vanguard. 37 of them are confirmed by a published case study, quote or press release.Latest check Oct 7, 2026: 50 of 50 companies checked, from 35 public sources.
- Category
- Customer Service Automation
- Customers by proof
- 37 confirmed, 13 observed
- Top industry
- Fintech & Payments, 10% of customers
- Most similar
- Assembled, 3 shared customers
- Website
- sierra.ai
What Sierra does
Sierra lets large enterprises build and run AI agents that handle customer conversations on chat, SMS, WhatsApp, email and voice. Agents are generated from SOPs, transcripts or plain-English descriptions with its Ghostwriter tool, then monitored and tested through built-in analytics. It serves brands in financial services, healthcare, telecom, retail and travel, with outcome-based pricing.
Written by usedby from sierra.ai.
Main features
Common uses
Works with
50 companies use Sierra
Every company below links to the public page that shows it uses Sierra. Open a row to see the dated capture.
| Company | Industry | First public proof | Proof |
|---|---|---|---|
 SoftBank | Investment & VC | On or before Jul 2026 | |
 Uber | Mobility & Ride-hailing | On or before Aug 2026 | |
 Vanguard | Investment & VC | On or before Jun 2026 | |
 Wayfair | E-commerce & D2C | On or before Jun 2025 | |
 Discord | DevTools & Infrastructure | — | |
 Docusign | IT Services & System Integration | On or before Jun 2026 | |
 Santander | Banking & Mortgages | On or before Aug 2026 | |
 ADT | Cybersecurity | On or before Nov 2024 | |
 Airtable | DevTools & Infrastructure | On or before Jun 2026 | |
 Chime | Fintech & Payments | On or before Dec 2025 |
Is Sierra right for your company?
See what companies in your industry use, from the companies we track. Pick your industry.
Of the 131 Fintech & Payments companies on usedby, 5 are listed as Sierra customers. 33 use only another Customer Service Automation tool.
- Sierra only, 2%
- Sierra and another tool in Customer Service Automation, 2%
- Another tool in Customer Service Automation only, 25%
- No Customer Service Automation tool we can see, 71%
These are companies usedby tracks because a public page names them, often Sierra's own customer page. It is not a market share. A company counts once, whatever the number of tools it uses.
What customers report
Results as published by Sierra and its customers. Each one links to its dated source. We quote, we do not score.
4.8/5CSAT score matched by Sierra on member chat
GuildVendor case studyPublished Dec 18, 2025
~20%reduction in total monthly calls
RunBuggyVendor case studyPublished Feb 3, 2026
6 weeksTime to live
NextVendor case studyPublished Feb 25, 2026
~30%share of cases that don't require an in-clinic
Modern AnimalVendor case studyPublished Apr 14, 2026
30%Share of inbound calls handled by Echo within the first month
ecoATMVendor case studyPublished May 4, 2026
four weeksTime to go live after project launch with a major
KrakenVendor case studyPublished Jun 11, 2026
60%Containment rate
Capital on TapVendor case studyPublished Jun 23, 2026
4.7Average customer satisfaction score
CLEARVendor case studyPublished Apr 21, 2025
Read the story
Woodside CollectionVendor case studyCaptured Oct 7, 2026
Read the story
ImprintVendor case studyPublished May 19, 2026
Read the story
Virgin Media O2Vendor case studyPublished Sep 24, 2026
Read the story
SafeliteVendor case studyPublished Nov 18, 2025With Sierra, we've reduced ticket volume expectations, allowing our team to concentrate on more complex cases with empathy and care.We believe in creating what we call 'magical moments'—really human exchanges where we share something we love with someone else. The interesting thing about Sierra is being able to do that at a much larger scale in our brand voice.Before you buy Sierra
What Sierra publishes on the points buyers check first, each with its source and check date.
| Data processing terms | A data processing agreement is available. | sierra.ai, checked Oct 4, 2026 |
|---|
Questions to ask in your demo
- Which of your customers look like us, by industry and size?
- What does a pilot cost, and what decides the move to a full contract?
- Where is our data stored, who can access it, and is it used to train models?
- How does Sierra work with the tools we already use?
Sierra alternatives
Tools compared with Sierra most often, with the customers they share.
| Tool | Customers | Shared with Sierra | Compare |
|---|---|---|---|
 Assembled39 customers, 3 shared | 39 | 3 | Sierra vs Assembled |
 CallMiner39 customers, 3 shared | 39 | 3 | Sierra vs CallMiner |
 Sanas48 customers, 2 shared | 48 | 2 | Sierra vs Sanas |
 Decagon43 customers, 2 shared | 43 | 2 | Sierra vs Decagon |
 Cognigy57 customers, 0 shared | 57 | 0 | Sierra vs Cognigy |
Questions about Sierra
Who uses Sierra?
50 companies use Sierra, including SoftBank, Uber, and Vanguard.
Which industries use Sierra?
The industries with the most Sierra customers are Fintech & Payments (5), Telecommunications (3), and Banking & Mortgages (2).
What are the alternatives to Sierra?
The tools compared with Sierra most often are Assembled (39 customers, 3 shared), CallMiner (39 customers, 3 shared), Sanas (48 customers, 2 shared), and Decagon (43 customers, 2 shared). See all Sierra alternatives.
How does usedby know who uses Sierra?
Each company is linked to a public page that names it: Sierra's customer page, a published case study, a press release or a job post. We save each page with a dated capture and check it again on each run. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
What do confirmed, observed and signal mean?
Confirmed (37): a case study, a named quote or a press release. Observed (13): Sierra shows the company on its own pages, for example a logo wall. Signal (0): a job post shows the company’s employees use Sierra, the weakest proof. Every level counts as a customer, and each line shows its level.
How current is this list?
The most recent check was on October 7, 2026, and 50 of 50 companies on this list have been checked so far. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
