Letterbook vs Respond.io

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

Letterbook

See full pricing history

USD · US · source: www.letterbook.ai

Plan	Pricing	Charged by	Offer type
Starter — default	USD 50 monthly · USD 50 / month with annual commitment $50 per month	Flat · per month	Standalone · Fixed
Growth — default Highlighted	USD 200 monthly · USD 200 / month with annual commitment $200 per month	Flat · per month	Standalone · Fixed
Enterprise — default	Contact sales Let's talk per month	Flat · per month	Standalone · Contact sales

Respond.io

See full pricing history

USD · US · source: respond.io

Plan	Pricing	Charged by	Offer type
Starter	USD 99 monthly · USD 79 / month with annual commitment $ 79 /month $1,188 $948/yr (billed yearly)	Unit · Monthly Active Contacts	Standalone · Fixed
Growth Highlighted	USD 199 monthly · USD 159 / month with annual commitment $ 159 /month $2,388 $1,908/yr (billed yearly)	Unit · Monthly Active Contacts	Standalone · Fixed
Advanced	USD 349 monthly · USD 279 / month with annual commitment $ 279 /month $4,188 $3,348/yr (billed yearly)	Unit · Monthly Active Contacts	Standalone · Fixed
Enterprise	Contact sales Custom	Unit · Monthly Active Contacts	Standalone · Contact sales

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

Letterbook

Starter — default

Highlights Seats: 3 seats

Included
Highlights Tickets per month: 300 tickets / month

Included
Highlights Integrations: Integrate your database & Stripe

Included
Highlights Inbox: Unified inbox for all your channels

Included

Growth — default

Highlights Seats: 10 seats

Included
Highlights Tickets per month: 1,000 tickets / month

Included
Highlights Channels and integrations: All channels and integrations

Included
Highlights Support: Priority support

Included

Enterprise — default

Highlights Seats: Custom seats

Included
Highlights Tickets per month: 3,000+ tickets / month

Included
Highlights Security: SSO & SAML

Included
Highlights Account management: Dedicated account manager

Included

Respond.io

Starter

Usage Users: 5

Included
Usage Monthly Active Contacts: Unlimited

Included
Usage AI Credits: 5,000

Included
Inbox & Contacts Team & Custom Inboxes: Included
Inbox & Contacts Mobile App: Included
AI & Automation AI Prompt: Included
AI & Automation AI Assist: Included
Reports Basic Reports: Included
Platform & Security Two-Factor Authentication (2FA): Included
Integrations Growth Widgets: Included

Growth

Usage Users: 10

Included
Usage Monthly Active Contacts: Starts with 1,000

Included
Usage AI Credits: Starts with 10,000

Included
Broadcasts Broadcasts: Included
AI & Automation Workflows automation: Included
AI & Automation AI Agents: Included
Reports Advanced Reports: Included
Integrations Zapier & Make Integrations: Included
Integrations Developer API: Included

Advanced

Usage Users: 10

Included
Usage Monthly Active Contacts: Starts with 1,000

Included
Usage AI Credits: Starts with 20,000

Included
Platform & Security Mask Phone Number & Email Address: Included
Platform & Security Multiple Workspaces: Included
Integrations HTTP Requests in Workflows: Included
Integrations Incoming & Outgoing Webhooks: Included
Platform & Security Single Sign-On (SSO): Included
Channels Custom Channels: Included

Enterprise

Usage Users: Unlimited

Included
Usage Monthly Active Contacts: Custom

Included
Usage AI Credits: Starts with 40,000

Included
Highlights Unlimited Users: Included
Highlights Higher limit of workspaces: Included
Highlights Higher API rate limits: Included

How their prices changed

Each dated row shows the public prices observed when that vendor’s pricing page changed.

Letterbook

August 27, 2026 Source
- Starter — default: USD 50 monthly · USD 50 / month with annual commitment
- Growth — default: USD 200 monthly · USD 200 / month with annual commitment
- Enterprise — default: Contact sales

Respond.io

August 27, 2026 Source
- Starter: USD 99 monthly · USD 79 / month with annual commitment
- Growth: USD 199 monthly · USD 159 / month with annual commitment
- Advanced: USD 349 monthly · USD 279 / month with annual commitment
- Enterprise: Contact sales
August 27, 2026 Source
- starter — default: USD 79 monthly · USD 79 / month with annual commitment
- growth — default: USD 159 monthly · USD 159 / month with annual commitment
- advanced — default: USD 279 monthly · USD 279 / month with annual commitment