YCS23ยท AILetterbook
AI-native customer support platform
Founders
Not read from YC yet; the weekly run fills these in.
Same space
Competitors
Closest in what they build, same category.
ChatwootW21The modern, open source, self-hosted AI customer support platformShared: customer service, customer supportActive
ParahelpS24Build an AI support agent that securely uses all your toolsShared: customer service, customer supportActive
AtlasW22Modern customer support platform replacement for Intercom and ZendeskShared: customer service, customer supportActive
FirstSupport.aiW21AI Assistant for Customer SupportShared: customer supportActive
NaraW22Answer 70% of your support and sales questions. InstantlyShared: customer service, customer supportAcquired
Adjacent
Overlapping tags, a different niche.
RulebaseF24AI customer operations for regulated industries.Shared: customer service, customer supportActive
ArigladW23Knowledge base maintenance on auto-pilotShared: customer service, customer supportActive
OpenW24Enterprise AI customer supportShared: customer service, customer supportActive
HiOperatorS16Customer support as a service.Shared: customer serviceActive
Clad LabsF25AI support done rightShared: customer supportActive
Also from S23 in AI
Batchmates in Summer 2023.
MindedS23Cursor for AI AgentsActive
AccendS23AI agents for commercial underwriting at banks and fintechsActive
AgentCollectS23B2B debt collection powered by AI agentsActive
AglideS23Connect every disconnected app to your SSO.Active
AirgoodsS23The modern distributor for grocers.Active
AiSDRS23AI that finds the right buyers and books sales meetingsActive
About Letterbook
Letterbook is the AI-native alternative to Zendesk, Freshdesk, Zohodesk, and Intercom. We help companies manage and resolve customer support tickets across email, in-app feedback, and website forms. Our AI will triage your tickets, write replies, and build your knowledge base.
San Francisco, CA, USA
Letterbook: questions
Which YC batch was Letterbook in?
Letterbook was in Y Combinator's Summer 2023 batch (S23).
Is Letterbook still active?
Y Combinator lists Letterbook as active.
Where is Letterbook based?
Letterbook lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.