How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Intercom Fin is the most mature helpdesk native AI agent, priced at $0.99 per resolved conversation on top of seat plans from $29 per month.
- Zendesk AI suits Zendesk shops that want AI agents inside their existing helpdesk, with resolutions reported from $1.50 to $2.00 each.
- Decagon and Ada are the closest enterprise peers to Sierra, with custom contracts and deep system integrations.
- Salesforce Agentforce suits Salesforce customers who want agents across service, sales, and commerce at $2 per conversation.
- Botpress and Help Scout suit smaller teams that want a lower cost start, with free tiers and per resolution pricing.
Quick comparison
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The best Sierra AI alternatives
#1Intercom Fin
Best for: Mature helpdesk AI agent4.5/5 on
G2 (2,900 reviews, checked Oct 2026)
Visit intercom.com
Starting price$29 per seat per month
Free planNo
Intercom Fin is the AI agent most support teams compare everything else against. It reads your help docs and resolves chats end to end, with pricing reported at $0.99 per resolved conversation on top of Intercom seat plans from $29 per seat per month, dropping to about $0.59 per resolution at very high monthly volume on enterprise deals. It can also run standalone on other helpdesks, so you do not have to move your whole support stack to use it. Setup is fast, often days to weeks, which is much quicker than enterprise platforms.
The trade off is cost model against control. Per resolution pricing is predictable per unit but grows with volume, and Fin counts an abandoned chat as resolved in some reports, which can flatter resolution numbers. Intercom Fin fits SaaS and digital first teams that want the most mature AI agent with a fast start and clear per outcome pricing.
What we like- Most mature AI agent on a helpdesk
- $0.99 per resolved conversation
- Works across many helpdesks
- Strong answer quality
- Fast setup
Watch out for- Per resolution bill grows with volume
- Abandoned chats may count as resolved
- Seats needed on top of resolution fees
- Enterprise volume pricing varies
Starting price$55 per agent per month
Free planNo
Zendesk AI brings AI agents, Copilot drafting, and intelligent triage into the Zendesk helpdesk, with Suite seats reported from $55 per agent per month and AI resolutions reported at $1.50 to $2.00 each. Agents work across chat, email, voice, and social, and routing rules can split tickets by intent, language, and priority. Copilot drafts replies for human agents, which helps teams that are not ready for full automation.
The trade off is depth against cost and setup time. Zendesk AI handles complex multi channel workflows better than most rivals, but the combined seat plus resolution bill adds up, and a messy knowledge base will produce confident wrong answers. Zendesk AI fits large teams with complex workflows that already run on Zendesk.
What we like- Native to Zendesk
- Agents across chat, email, voice, and social
- Copilot drafts for humans
- Granular routing and triage
- Strong admin controls
Watch out for- Resolutions cost extra on top of seats
- Implementation takes weeks
- Messy knowledge bases get amplified
- Small teams pay for power they never use
#3Ada
Best for: Mid market no code agents4.6/5 on
G2 (173 reviews, checked Oct 2026)
Visit ada.cx
Starting priceSee website
Free planNo
Ada is a proven no code AI agent platform for mid market and enterprise brands, covering chat and voice with strong analytics and enterprise security. It is a closer peer to Sierra than helpdesk native tools, with a focus on high volume support and measurable resolution rates. Pricing is custom contract only, with third party reports of typical contracts around $4,500 to $6,000 per month and higher minimums for large deployments, so expect a sales led process.
The trade off is capability against accessibility. Ada is strong for brands that need voice plus chat at scale, but there is no self serve tier and no public price. Ada fits mid market companies that want a proven no code agent and can commit to an enterprise contract.
What we like- Proven no code AI agent
- Voice plus chat support
- Strong for high volume brands
- Good analytics
- Enterprise grade security
Watch out for- Custom contract only
- No self serve tier
- Reported six figure annual minimums
- Implementation takes weeks
#4Decagon
Best for: Enterprise system integrations4.8/5 on
G2 (29 reviews, checked Oct 2026)
Visit decagon.ai
Starting priceSee website
Free planNo
Decagon is the enterprise AI agent platform closest to Sierra in ambition, building agents that connect deeply to company systems and take actions, not just answer questions. It suits enterprises that want agents to check orders, update accounts, and complete multi step tasks inside their own tools. Pricing is custom enterprise pricing, with third party reports of monthly fees around $5,000 plus setup costs, and implementation typically runs 6 to 12 weeks.
The trade off is depth against time and cost. Decagon handles complex, system connected work that helpdesk native tools cannot, but it needs engineering time and an enterprise budget. Decagon fits enterprises that want AI agents tied deeply to their systems and can invest in a long implementation.
What we like- Agents tied deeply to company systems
- Strong for complex actions
- Enterprise grade
- Good handoff with context
- Growing enterprise customer base
Watch out for- Custom enterprise pricing
- Implementation runs 6 to 12 weeks
- Overkill for small teams
- Needs engineering time for integrations
#5Salesforce Agentforce
Best for: Salesforce customers4.3/5 on
G2 (1,464 reviews, checked Oct 2026)
Visit salesforce.com
Starting price$2 per conversation
Free planNo
Salesforce Agentforce extends AI agents across service, sales, and commerce for Salesforce customers, with pricing reported at $2 per conversation through usage based Flex Credits and custom enterprise contracts for large volumes. Because agents read CRM data directly, they can personalize answers and take actions inside Salesforce without a separate integration project. Governance and audit tools are enterprise grade, which suits regulated teams.
The trade off is ecosystem fit against standalone value. Agentforce is strongest for teams already on Salesforce, but it is less attractive as a standalone support tool. Agentforce fits Salesforce customers who want agents across service and sales with CRM data built in.
What we like- Native to Salesforce
- Agents across service, sales, and commerce
- Usage based Flex Credits
- Strong data and CRM integration
- Enterprise governance
Watch out for- Best value only inside Salesforce
- Conversation pricing adds up at volume
- Setup needs Salesforce expertise
- Smaller standalone appeal
Starting priceSee website
Free planNo
Freshworks Freddy AI is the AI agent layer for Freshdesk and Freshservice, with per session pricing reported around $0.49 per session and 500 free sessions on some plans. It suits small and mid sized teams that already run on Freshworks and want AI answers and agent Copilot tools without changing helpdesks. Setup is fast inside the Freshworks stack, and pricing is usage based so small teams pay for what they use.
The trade off is ecosystem fit against enterprise depth. Freddy is a good value pick inside Freshworks, but it lacks the deep system integrations and voice depth of enterprise platforms. Freddy fits SMBs and mid market teams that run on Freshworks and want affordable AI support.
What we like- Native to Freshdesk and Freshservice
- Per session pricing
- Fast setup inside Freshworks
- Copilot tools for agents
- Good value for SMBs
Watch out for- Best value only inside Freshworks
- No public per resolution rate
- Advanced features need higher tiers
- Smaller enterprise footprint than Ada or Decagon
Starting price$25 per user per month
Free planNo
Help Scout AI Answers is the AI layer for Help Scout, priced at $0.75 per AI resolution on top of paid plans from $25 per user per month. It is built for small, human first teams that want AI to absorb repetitive chats while keeping a clean handoff to people, with summaries that carry context into the human reply. Pricing is among the lowest per resolution in this guide, which makes it attractive for small teams with tight budgets.
The trade off is price against coverage. Help Scout AI Answers covers chats well, but email coverage is limited, and seats cost extra on top of resolution fees. Help Scout fits small teams that want affordable AI answers with a human first design.
What we like- Low per resolution price at $0.75
- Human first design
- Good handoff summaries
- Simple setup
- Fair pricing for small teams
Watch out for- Email coverage is limited in AI Answers
- Seats cost extra
- Smaller enterprise feature set
- Fewer channels than Zendesk
#8Botpress
Best for: Build your own agent4.5/5 on
G2 (514 reviews, checked Oct 2026)
Visit botpress.com
Starting priceSee website
Free planYes
Botpress is the builder option for teams that want to design their own AI agent rather than buy a fixed product. It offers a free tier, no per seat pricing, and a visual builder for flows, knowledge, and integrations, so technical teams can shape exactly the agent they want. It suits custom workflows, internal tools, and products where a standard support agent does not fit.
The trade off is control against effort. Botpress gives you freedom and a free start, but you build, test, and maintain the agent yourself, which takes engineering time. Botpress fits technical teams that want to build and customize their own agent and are comfortable owning it.
What we like- Free tier
- No per seat pricing
- Full builder control
- Open framework
- Good for custom workflows
Watch out for- Needs technical skill
- You build and maintain the agent
- Support is community led on free tiers
- Enterprise features cost extra
How we chose
We compared published pricing and feature lists from 2026, favoring tools with distinct strengths: the most mature helpdesk agent, the best Zendesk native option, the best mid market no code agent, the closest enterprise peer, the best Salesforce native agent, the best Freshworks native agent, the lowest cost small team option, and the best builder. We recorded prices as reported and wrote See website where pricing is custom or unpublished. We excluded Sierra itself, since this guide covers replacements, and we favored tools with a current release and an active user base.
How to choose a Sierra AI alternative
Start with your helpdesk: Intercom shops should shortlist Fin, Zendesk shops should shortlist Zendesk AI, Freshworks shops should shortlist Freddy, and Salesforce shops should shortlist Agentforce. Next, model the real bill: per resolution pricing grows with volume, while flat enterprise contracts cost more upfront but cap the bill, so compare both at your actual ticket volume and deflection rate. Then test resolution quality on your own tickets, since vendor case studies often show 60 to 80 percent on simple tickets and much less on complex billing and technical work. Finally, keep a human handoff path with full context, and never let an agent settle refunds, billing disputes, or account closures alone.
Frequently asked questions
What is the best Sierra AI alternative overall?
Intercom Fin is the best general pick for most teams, with the most mature helpdesk agent and clear per resolution pricing. Decagon and Ada are closer enterprise peers for large brands that need deep system integrations.
How much do AI support agents cost?
Pricing mixes seat fees with per resolution or per conversation charges: Intercom $0.99 per outcome plus seats from $29, Zendesk $1.50 to $2.00 per resolution plus seats from $55, Agentforce $2 per conversation, Freddy about $0.49 per session, and Help Scout $0.75 per resolution. Enterprise platforms like Sierra, Decagon, and Ada are quote based.
What resolution rate should I expect?
It depends on ticket mix. Simple, repetitive tickets like order status and password resets can see 60 to 80 percent resolution, while complex billing disputes and technical troubleshooting land much lower. Any vendor promising one number without seeing your tickets is selling, not advising.
Will AI agents replace my support team?
For most companies, no. They absorb repetitive tier one volume so human agents handle complex, high value conversations, and teams typically redeploy staff to trickier queues or handle growth without hiring.
How long does implementation take?
Helpdesk native tools like Intercom and Botpress go live in days to weeks, mid market platforms like Ada take a few weeks, and enterprise deployments with deep integrations, including Sierra, Decagon, and Ada, usually run 6 to 12 weeks.
Can AI agents work with my existing helpdesk?
Yes, for most. Intercom Fin runs across many helpdesks, Zendesk AI is native to Zendesk, Agentforce is native to Salesforce, and Freddy is native to Freshworks. Standalone platforms like Decagon and Ada integrate with major helpdesks but need setup time.
Sources we checked (0)
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.
Zendesk AI
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