Sincerely is web software for B2B direct mail campaigns using CRM or CSV audiences. It creates personalized printed pieces and measures campaigns against account-level holdout groups. Salesforce and HubSpot connections sync account, contact, opportunity-stage, and campaign-membership data; CSV import is also supported. Drafts draw on account research, with each factual claim linked to a source. A person must approve a draft before printing, and edits are versioned. Postcards and letters are available, while handwritten notes and gifts are not live. 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 its eight campaign types measure lift against a holdout. The free Audit plan supports importing, a mailability audit, brand materials, and draft editing, but cannot mail. Paid plans start at $250/mo. When a plan reaches its monthly cap, live campaigns pause. Data is encrypted in transit, workspace access is scoped, and state-changing actions are logged.
Who it is for
Sincerely suits B2B teams that want to send personalized postcards or letters to CRM or CSV audiences and assess campaigns with holdout groups. It may also fit teams that need address checks and human draft approval.
What is good
- Connects Salesforce and HubSpot, with CSV import too.
- Personalized drafts link factual claims to sources.
- Address verification and correction included on every plan.
- Human approval and versioned edits before printing.
What to know first
- Free Audit plan cannot mail.
- Handwritten notes and gifts are not live.
- Campaigns pause when the monthly cap is reached.
- No API access is listed.
Verdict
Sincerely combines audience imports, personalized mail, and holdout measurement, with approval and address review in the workflow. Check the piece limits and plan terms against campaign needs before choosing a paid option.
Sincerely plans and pricing
All plansCompared on direct mail automation software
- Free plan
- Yes
- Paid from
- $250/mo
- Mail formats
- 4x6 postcards; 6x9 postcards; letters
- Personalization level
- one-to-one
- API access
- No
- CRM connections
- Salesforce; HubSpot
- Address verification
- Yes
- Delivery scope
- both
