Kayako vs Letterbook (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: Kayako does not list a price
Free plan
Tie
Neither has one
Higher rating
Tie
3.8 against 3.8
Same job?
Yes
Both are Customer Support tools

Side by side

Compared on	Kayako	Letterbook
Our rating	3.8	3.8
Starts at	Not listed	$50/mo
Free plan	No	No
Category	Customer Support	Customer Support
Plans	See pricing	From $50/mo
Key features	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) Semantic search knowledge base Enterprise security (SOC 2, GDPR, SSO/SAML)	Playbook-driven auto-resolution for common support scenarios Direct connections to inbox, product database, and Stripe Contact-center-style review interface for AI-drafted replies No per-resolution or usage-based surprise fees Founder-defined scenarios instead of generic ticket-routing rules
Pros	Continuous learning from human resolutions improves coverage over time, not a static model Integrates with existing help desks rather than requiring a full platform switch Results are measured and quantified (before/after ticket age, CSAT), not just claimed	Flat monthly pricing avoids the per-resolution fee structures competitors use Founders' prior product experience (scaling to 100,000 users) lends practical credibility Playbook approach gives founders direct control over how AI responds to customers
Cons	No public pricing - requires booking a strategy session White-glove implementation model means less self-serve control over setup 80%-automation-in-90-days claim depends on ticket volume and complexity	No permanent free tier, only a 7-day trial $50-$200 monthly range may still be a stretch for pre-revenue startups Auto-resolution quality depends entirely on how well a team writes its playbooks
Company	Kayako	Letterbook, founded 2023

Prices come from each vendor's pricing page, last checked 20260824. Check the vendor before you buy.

FAQ

Questions people ask

Is Kayako better than Letterbook?

In our reviews Kayako scores 3.8 and Letterbook scores 3.8. The better pick depends on the job. Kayako: Kay AI Agent triages, drafts replies, and learns from every human resolution - measured at 52% AI-resolved tickets and an 87.2% deflection rate. Letterbook: AI-native customer support platform that drafts and resolves tickets using a company's own playbooks.

Which is cheaper, Kayako or Letterbook?

Kayako: see pricing. Letterbook: from $50/mo.

Do Kayako and Letterbook have free plans?

Neither lists a free plan.

More comparisons

Kayako compared with

All Kayako alternatives

Letterbook compared with

All Letterbook alternatives