Sincerely

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

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About

Sincerely is ranked #12 of 28 in direct mail automation software on Inferse. It runs on Web. There is a free plan. Paid plans start at $250/mo.

Compared on direct mail automation software

Free plan: Yestrysincerely.com
Paid from: $250/motrysincerely.com
Mail formats: 4x6 postcards; 6x9 postcards; letterstrysincerely.com
Personalization level: one-to-onetrysincerely.com
API access: Notrysincerely.com
CRM connections: Salesforce; HubSpottrysincerely.com
Address verification: Yestrysincerely.com
Delivery scope: bothtrysincerely.com

Facts

What it does: Sincerely describes itself as software for B2B direct mail that uses CRM or CSV audiences, personalized printed pieces, and measurement against holdout groups.trysincerely.com · 4 Oct 2026
Personalized writing: The product generates personalized drafts from account research and pins each factual claim to a source.trysincerely.com · 4 Oct 2026
Live mail formats: Postcards and letters can be mailed today; handwritten notes and gifts are not live because their fulfillment adapters are not built.trysincerely.com · 4 Oct 2026
Integrations: Salesforce and HubSpot sync account, contact, opportunity-stage, and campaign-membership data, and CSV import is also supported.trysincerely.com · 4 Oct 2026
Campaign measurement: Every plan includes account-level holdouts, and the page says five of eight campaign types measure lift against a holdout.trysincerely.com · 4 Oct 2026
Address checks: Sincerely says address verification and correction are included on every plan, with low-confidence addresses routed to review.trysincerely.com · 4 Oct 2026
Human approval: Drafts require human approval before printing, and the product versions edits.trysincerely.com · 4 Oct 2026
Security: The privacy policy says data is encrypted in transit, access is scoped per workspace, and state-changing actions are written to an audit log.trysincerely.com · 4 Oct 2026
Data use: Sincerely says it does not sell personal information or use CRM data to train models or benefit another customer.trysincerely.com · 4 Oct 2026
Mail providers: Lob prints US postcards and letters, while a Canadian provider prints Canadian pieces; customers contract with neither vendor through Sincerely.trysincerely.com · 4 Oct 2026
Billing limit: When a plan reaches its monthly cap, live campaigns pause rather than print additional pieces.trysincerely.com · 4 Oct 2026
Agent access: Sincerely supports MCP clients through browser sign-in and OAuth, while actions that print or spend are not available to agents.trysincerely.com · 4 Oct 2026