Shortlist by what you need
Start here if you know why you are leaving Letterbook.
Want the closest match?
KayakoMost similar to Letterbook in what it does, its category and its price.
Visit (opens Kayako in a new tab)Need a free plan?
eesel AIHas a free plan, rated 4.2 out of 5. Letterbook has none.
Visit (opens eesel AI in a new tab)Want to pay less than Letterbook?
OpenFrom $0.99/mo, against from $50/mo for Letterbook.
Visit (opens Open in a new tab)Want the best rated?
Freddy AIRated 4.4 out of 5 in our review, against 3.8 for Letterbook.
Visit (opens Freddy AI in a new tab)
At a glance
Green means better than Letterbook, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 LetterbookBaseline | 3.8 | $50/mo | No | AI-native customer support platform that drafts and resolves tickets using a company's own playbooks. | |
| Kayako | 3.8Same | Not listed | No | Kay AI Agent triages, drafts replies, and learns from every human resolution - measured at 52% AI-resolved tickets and an 87.2% deflection rate. | vs Letterbook |
 Duckie | 4.2+0.4 | $725/mo$675 more | No | AI support agent that resolves B2B SaaS tickets end-to-end across Slack, Zendesk, and Intercom. | vs Letterbook |
 Yuma AI | 4.1+0.3 | Not listed | No | Ecommerce support agents that process the refund rather than drafting a reply about it. | vs Letterbook |
 HappyFox | 3.8Same | Not listed | No | AI built into every help desk workflow - ticket summarization, draft replies, an AI Contact Center with voice, and a 24/7 self-service chatbot. | vs Letterbook |
 My AskAI | 4.0+0.2 | Free | YesLetterbook has none | Support agent that sits inside Intercom or Zendesk rather than replacing them. | vs Letterbook |
| Open | 4.1+0.3 | $0.99/mo$49.01 less | No | Charges 99 cents per resolved ticket instead of per seat. | vs Letterbook |
| Freddy AI | 4.4+0.6 | $15/mo$35 less | No | Freshworks' AI layer, spanning support and its wider business suite | vs Letterbook |
| eesel AI | 4.2+0.4 | $300/mo$250 more | YesLetterbook has none | AI agent platform trained on a company's own knowledge base to answer support and internal questions inside Slack, Teams, and helpdesks. | vs Letterbook |
The alternatives in detail
In order of how closely each one matches Letterbook.
Kayako
3.8Not listed
vs LetterbookSame
Kay AI Agent triages, drafts replies, and learns from every human resolution - measured at 52% AI-resolved tickets and an 87.2% deflection rate.
- Kay AI Agent - triage, drafting, and continuous learning from human resolutions
- Measured 52% AI-resolved tickets, 87.2% deflection rate
- Works alongside existing help desks (Zendesk, Freshdesk, Intercom, Salesforce)
Continuous learning from human resolutions improves coverage over time, not a static model
No public pricing - requires booking a strategy session
Duckie
4.2$725/mo
vs Letterbook$675 more+0.4
AI support agent that resolves B2B SaaS tickets end-to-end across Slack, Zendesk, and Intercom.
- End-to-end ticket resolution across Slack, Zendesk, and Intercom
- Resolution Memory that reuses validated answers for repeat issues
- Action automation for refunds, order tracking, and account updates
Reports 71% ticket deflection and an 80% cut in resolution time for customers like Grid
Entry price of $725/month billed yearly prices out smaller support teams
Yuma AI
4.1Not listed
vs Letterbook+0.3
Ecommerce support agents that process the refund rather than drafting a reply about it.
- Support AI for WISMO, returns, refunds and exchanges
- Sales AI for pre-purchase questions and recommendations
- Social AI for Instagram and Facebook DMs
Takes the action rather than drafting a reply about it
No published rate for resolved tickets
HappyFox
3.8Not listed
vs LetterbookSame
AI built into every help desk workflow - ticket summarization, draft replies, an AI Contact Center with voice, and a 24/7 self-service chatbot.
- Ticket summarization and AI-drafted reply generation
- Mid-conversation knowledge surfacing for agents
- AI Contact Center with voice AI
Mid-conversation knowledge surfacing genuinely changes agent workflow speed
Pricing isn't disclosed on the homepage
My AskAI
4.0Free
vs Letterbook+0.2Free plan
Support agent that sits inside Intercom or Zendesk rather than replacing them.
- Works inside Intercom, Zendesk and other helpdesks
- No migration from the existing support stack
- Escalation to human agents
Layers onto the helpdesk a team already runs
The 75% deflection figure is a vendor claim
Open
4.1$0.99/mo
vs Letterbook$49.01 less+0.3
Charges 99 cents per resolved ticket instead of per seat.
- Agent 5 automation across voice, chat, email and messaging
- One training pass covering every channel
- Clean handoff to human agents
$0.99 per resolution aligns the vendor with the outcome, not headcount
Automation rate and accuracy are vendor figures with no stated method
Freddy AI
4.4$15/mo
vs Letterbook$35 less+0.6
Freshworks' AI layer, spanning support and its wider business suite.
- AI layer spanning Freshworks' support, sales, and IT products
- Ticket summarization and suggested responses
- Autonomous resolution for common support questions
Consistent AI experience for companies already using multiple Freshworks products
Full value depends on already using Freshworks products
eesel AI
4.2$300/mo
vs Letterbook$250 more+0.4Free plan
AI agent platform trained on a company's own knowledge base to answer support and internal questions inside Slack, Teams, and helpdesks.
- Training directly on Google Docs, Notion, Confluence, SharePoint, and help centers
- Deployment into Slack, Microsoft Teams, and helpdesk tools like Zendesk
- Usage-based billing by resolved task rather than per-seat licensing
Usage-based pricing means teams pay only for tasks the AI actually resolves
Usage-based per-task pricing makes monthly cost harder to predict than a flat subscription
FAQ
Questions people ask
Is Letterbook free?
Letterbook does not list a free plan. Paid plans start from $50/mo.
What is the best free alternative to Letterbook?
eesel AI is the highest-rated alternative here with a free plan (4.2 out of 5). Other free options: My AskAI.
What is the cheapest alternative to Letterbook?
Among paid plans, Open has the lowest starting price (from $0.99/mo). If you need it free, start with eesel AI.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.