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SPECIFICTION
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Sincerely

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From $250/mo Free plan Web
Visit trysincerely.com
Spec score 7.4 #16 of 28 in Direct Mail Automation Software

What it is

Sincerely is web software for B2B direct-mail campaigns using CRM or CSV audiences, personalized printed pieces, and measurement against account-level holdout groups. Salesforce and HubSpot sync account, contact, opportunity-stage, and campaign-membership data, and CSV import is supported. The product drafts personalized writing from account research and links each factual claim to a source. Drafts require human approval before printing, and edits are versioned. Postcards and letters can be mailed; handwritten notes and gifts are not live because their fulfillment adapters are not built. Address verification and correction are included on every plan, with low-confidence addresses routed for review. Every plan includes account-level holdouts, and Sincerely says five of eight campaign types measure lift against a holdout. When a plan reaches its monthly cap, live campaigns pause rather than print additional pieces. The free Audit plan supports imports, a mailability audit, brand designs, and draft editing, but cannot mail. Paid plans start at $250 a month; Pilot is 199.00 USD once.

Spec sheet

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

Plans and prices

Audit plan Free CRM or CSV import · mailability audit · brand kit and designs · draft generation and editing · cannot mail Read 4 Oct 2026 · trysincerely.com
Pilot $199, paid once One time 100 pieces · account-level holdout · no per-piece charges · credited toward first month if continuing Read 4 Oct 2026 · trysincerely.com
Core $250 a month $250 /mo 150 pieces included · up to 600 a month · letters and postcards · Salesforce and HubSpot sync · account-level holdouts Read 4 Oct 2026 · trysincerely.com
Starter $500 a month $500 /mo 350 pieces included · up to 2,000 a month · standard reports Read 4 Oct 2026 · trysincerely.com
Growth $1,500 a month $1,500 /mo 1,300 pieces included · up to 10,000 a month · eight campaign types · approval workflows and spend limits · opportunity attribution Read 4 Oct 2026 · trysincerely.com
Scale $3,500 a month $3,500 /mo 3,700 pieces included · up to 25,000 a month · governance and roles · named report contact · lowest per-piece prices Read 4 Oct 2026 · trysincerely.com

Every Sincerely plan and price →

Strong points and limits

Strong points

  • Salesforce and HubSpot sync audience data
  • CSV import is supported
  • Address verification and correction on every plan
  • Drafts require approval before printing
  • All plans include account-level holdouts

Limits

  • Free Audit plan cannot mail
  • Handwritten notes and gifts are not live
  • Campaigns pause at monthly plan caps
  • No API access

Who it suits

Sincerely suits B2B teams that want to send personalized postcards or letters to CRM or CSV audiences and measure campaigns against holdouts. The free plan can support an audit and draft preparation, but not mailing.

Verdict

Sincerely combines personalized direct mail with address checks, approval controls, and holdout measurement. Mailing starts with paid plans at $250 a month, while Pilot costs 199.00 USD once.

Where Specifiction places it

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