Browser Use
Browser Use
19
Let agents drive a real browser
- Version
- API v4
- Cost
- Pay as you go (no subscription). Free tier offers $1 signup credit. Cloud browser from $0.02/hr + traffic.
- Model
- Bring your own key
Sierra
Sierra · #10 most active of 22 in Agents & Automation
Sierra builds branded voice and chat agents for support, charging per resolved conversation rather than per seat.
100
Trust score · Verified
2 data points checked · 2026-11-01
Current version
Agent OS 2.0
Entry cost
Pricing is outcomes-based (pay for results, not tokens), contact Sierra for custom pricing.
Changes / 30d
1
The short answers · verified October 29, 2026
- What is the latest version of Sierra?
- The current shipped version of Sierra is Agent OS 2.0, as of October 29, 2026.
- How much does Sierra cost?
- Sierra has no published flat entry price. Pricing is outcomes-based (pay for results, not tokens), contact Sierra for custom pricing.
- What AI model does Sierra use?
- Sierra runs primarily on Claude.
Source: Sierra — sierra.ai · Reusable under CC BY 4.0 — cite Tomorrow
Capabilities
- Voice and chat agents
- Agent OS
- Brand persona control
- Supervisor tooling
- Outcome analytics
- Horizon (Long-horizon agents)
- Ghostwriter (Agent-building agent)
- Agent Studio 2.0
- Agent Data Platform (ADP)
- MCP Gateway
- Multi-channel support
- Agency (Secure sandboxes)
- Horizon agents
- Ghostwriter
- Agent Data Platform
- Outcomes-based pricing
- Agent Studio
- Horizon
- Context Engine
- Ghostwriter agent builder
- Agency sandboxes
- Agency Sandboxes
- Voice Personas
- Agent OS 2.0
- Insights Explorer
- Plaid integration
- Plaid Integration
- Agency
- Release governance
- IVR navigation
- Guardrails
- Horizon Agent
- Multimodal agents
- Goals and guardrails
- Memory
- Slack integration
- Horizon Context Engine
- Multimodal Agents
- Personal Agent Protocol
- Conversational Agents
- Horizon Agents
- Conversational AI
- Outbound agents
- Inbound agents
- Teams integration
- fleming-1
- Stripe Payments
- Outbound Interactions
- Multilingual Support
- Omnichannel Support
- Compliance Console
- 𝜏-Entity
- Stripe integration
Pricing
Outcome pricing
per resolution
Free
Entry price over time
Not enough pricing history yet — we start charting from the second observation.
Geek mode
Models under the hood
- disclosed
Claude
Anthropic
- disclosed
fleming-1
Sierra
- disclosed
GPT-5 class
OpenAI
- inferred
OpenAI models
OpenAI
- unknown
Sierra Agent OS 2.0
Sierra
Context window
Model-dependent
Public API
yes
Multi-model routing
yes
Stack signals
- Pinecone
- Plaid
Shared model stack
Other tracked products running on the same foundation models — a quick read on how much of the catalog moves when one of these models changes.
- Claude+1 aliasAnthropic · 47 products
- Anthropic models+3 aliasesOpenAI · 9 products
- GPT-5 classOpenAI · 9 products
- fleming-1Sierra · 1 product
- Sierra Agent OS 2.0Sierra · 1 product
green disclosed · amber inferred · grey unattributed. Aliases are folded into one model; provider concentration counts only models with an established vendor.
Reported scale
Reference data. Each figure is whatever the source actually said — weekly users, downloads, revenue run-rate — with its own definition and date. These are not comparable between tools and are never used to rank anything.
No public usage figure on record for this product.
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- Model
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Elsewhere on the same models
Products in other segments that name one of Sierra's models in their stack.
Agentforce
Salesforce
1
Autonomous service and sales agents grounded in CRM data.
- Version
- Agentforce
- Cost
- from $2/mo
- Model
- Claude
AI/BI Genie
Databricks
6
Ask your lakehouse questions
- Version
- Genie
- Cost
- No per-seat or per-license fees. Included with Databricks Lakehouse (standard DBU rates apply).
- Model
- Claude
Enterprise assistant grounded in a company's AWS-connected content.
- Version
- Amazon Q Business
- Cost
- Free tier · from $3/mo
- Model
- Claude
Amazon Q Developer
AWSUnited States
4
AWS-native coding agent
- Version
- Developer
- Cost
- Free tier · from $19/mo
- Model
- Claude
CoCounsel
Thomson Reuters
Legal assistant on Westlaw
- Version
- 2026 platform
- Cost
- Enterprise contract pricing
- Model
- Claude
Devin
Cognition
8
Autonomous software engineer that works asynchronous tickets.
- Version
- SWE-2
- Cost
- Free tier · from $20/mo
- Model
- Claude
Change history
- capability
- capability
- capability
New capabilities: Conversational Agents, Horizon Agents
39 tracked41 tracked · +Conversational Agents, Horizon Agents
source - model
Sierra added fleming-1 to its model stack
Claude, GPT-5 class, OpenAI models, Sierra Agent OS 2.0Claude, GPT-5 class, OpenAI models, Sierra Agent OS 2.0, fleming-1
source - capability
- capability
- capability
New capabilities: Agency, Release governance
27 tracked29 tracked · +Agency, Release governance
source - capability
New capabilities: Voice Personas, Horizon agents, Context Engine
5 tracked11 tracked · +Voice Personas, Horizon agents, Context Engine, Agency, MCP Gateway, Pinecone
source - capability
- capability
- capability
- capability
- version
- capability
New capabilities: Horizon (Long-horizon agents), Ghostwriter (Agent-building agent), Agent Studio 2.0
58
source - capability
New capabilities: Ghostwriter, Insights Explorer
8 tracked10 tracked · +Ghostwriter, Insights Explorer
source - capability
New capabilities: Voice AI, Live Assist, Context engineering
10 tracked14 tracked · +Voice AI, Live Assist, Context engineering, Always-on evaluation layer
source - capability
New capabilities: Agent OS 2.0, Voice agents, Linnaeus search model
7 tracked11 tracked · +Agent OS 2.0, Voice agents, Linnaeus search model, Darwin reranking model
source - model
- capability
New capabilities: Agent Studio 2.0, PCI-compliant payments, Ghostwriter
7 tracked11 tracked · +Agent Studio 2.0, PCI-compliant payments, Ghostwriter, Explorer
source - capability
New capabilities: Agent Studio, Agent SDK, Live Assist
7 tracked10 tracked · +Agent Studio, Agent SDK, Live Assist
source - model
Sierra added Constellation of models (15+ purpose-built models) to its model stack
—Constellation of models (15+ purpose-built models)
source - capability
- capability
New capabilities: Publish to ChatGPT, Workspaces, Visual Attachments
5 tracked8 tracked · +Publish to ChatGPT, Workspaces, Visual Attachments
source - capability
New capabilities: Voice Personas, Agent OS 2.0, Insights Explorer
22 tracked25 tracked · +Voice Personas, Agent OS 2.0, Insights Explorer
source - capability
- capability
- model
Sierra added Sierra Agent OS 2.0 to its model stack
Claude, GPT-5 classClaude, GPT-5 class, Sierra Agent OS 2.0
source - capability
- capability
- capability
- model
Sierra added OpenAI models to its model stack
Claude, GPT-5 class, Sierra Agent OS 2.0Claude, GPT-5 class, OpenAI models, Sierra Agent OS 2.0
source - capability
- capability
- capability
- capability
New capabilities: Horizon Context Engine, Multimodal Agents
36 tracked38 tracked · +Horizon Context Engine, Multimodal Agents
source - capability
New capabilities: Conversational AI, Outbound agents, Inbound agents
41 tracked45 tracked · +Conversational AI, Outbound agents, Inbound agents, Teams integration
source - capability
- capability
New capabilities: Outbound Interactions, Multilingual Support, Omnichannel Support
47 tracked50 tracked · +Outbound Interactions, Multilingual Support, Omnichannel Support
source - capability
- capability
Sierra compared
Straight head-to-head pages against the busiest products in Agents & Automation.
How to cite this page
Free to cite and reuse under CC BY 4.0. Permalink: https://tomorrow.aliensquad.ai/tools/sierra
APA
Tomorrow. (2026). Sierra — version, pricing and model stack [Data set entry]. AlienSquad. Retrieved 2026-11-08, from https://tomorrow.aliensquad.ai/tools/sierra
BibTeX
@misc{tomorrow-tools-sierra,
author = {{Tomorrow}},
title = {Sierra — version, pricing and model stack},
year = {2026},
publisher = {AlienSquad},
howpublished = {\url{https://tomorrow.aliensquad.ai/tools/sierra}},
note = {Accessed: 2026-11-08}
}