PostBridge

PostBridge lets teams prepare and mail business documents from a PDF or a connected workflow, with tracking and mailing records kept in one workspace. A team member reviews and approves each quote before a job can print. The workspace supports letters, postcards, stamps, shipping labels, and tracked or verified delivery, with address verification available. PostBridge connects with tools including Clio, QuickBooks, Salesforce, HubSpot, Zoho Books, Google Sheets, Airtable, Google Drive, OneDrive, Dropbox, SharePoint, Google Docs, and Canva. Automation options include REST API endpoints, MCP tools, GPT Actions, SDKs, and agent workflows. Mail service is available in the United States, United Kingdom, and France through USPS, Royal Mail, and La Poste. Users can access it on web, iOS, Android, or within ChatGPT. Business/Profile costs $39 a month, with postal usage charged separately; an eligible workspace receives one 14-day trial. PostBridge says it is GDPR compliant and SOC 2 aligned, and that customer documents and contact data are not sold or used to train AI models.

PostBridge combines document mailing, approval controls, tracking records, and workflow integrations for teams with recurring postal tasks. Consider the separate postal charges and the stated mailing limits before choosing it.

PostBridge suits legal, finance and accounting, real estate, marketing, and other teams that send business mail. It may also fit teams looking to connect postal workflows with business tools or APIs.

PostBridge is a postal workflow platform that turns uploaded PDFs or connected workflows into mailed business documents with tracking records. It suits teams that send recurring mail and need approval controls, integrations, or API automation. Its strongest case is bringing mailing and workflow oversight together; postal charges are separate, and some USPS options have limits.

Overview

Teams can send letters and postcards, as well as use stamps, shipping labels, tracked delivery, and verified delivery options. PostBridge keeps mailing records alongside the workflow, making it more suited to organized business correspondence than occasional one-off personal mail.

A quote must be reviewed and approved by a team member before anything prints. That checkpoint is useful when a team needs control over outgoing jobs, though it also means automation does not remove the need for human approval.

Key features

Workflow connections and automation

Listed integrations include Clio, QuickBooks, Salesforce, HubSpot, Zoho Books, Zoho Invoice, Harvest, Google Sheets, Airtable, Google Drive, OneDrive, Dropbox, SharePoint, Google Docs, and Canva. The range covers common business, document, and productivity tools, giving teams ways to connect postal tasks to existing work.

REST API endpoints, MCP tools, GPT Actions, SDKs, and agent workflows provide options for teams building postal automation. Address verification is supported, and CRM connections include Salesforce, HubSpot, Zoho CRM, and Dynamics 365.

Postal coverage and records

PostBridge says it serves the United States, United Kingdom, and France through USPS, Royal Mail, and La Poste. Stored proof documents can be downloaded for seven years. Letter content is retained for 90 days after fulfillment, or 30 days after a failed, expired, or refunded send; uploaded files are cleared within about 30 minutes. That distinction matters for teams that need long-lived proof without retaining document content indefinitely.

The company describes its service as GDPR compliant and SOC 2 aligned, and says it does not sell documents or contact data or use them to train AI models.

Delivery caveats

Priority Mail is currently unavailable for new letters, and USPS Certified Mail does not include paper PS Form 3811. Teams whose process depends on either option should confirm their requirements before adopting PostBridge.

Pricing

PostBridge has no free plan. Business/Profile costs $39 a month, billed $39 / £35 / €37 monthly or $390 / £350 / €370 annually, with 2 months free. It includes five licensed Team members and unlimited free viewers; additional licensed members cost $9.99 monthly or $99 annually. Postal usage is charged separately, so the subscription is not the full cost of sending mail.

The included seats make Business/Profile a fit for a small team that needs several people to prepare or approve mail while allowing others to view. The per-member charge matters as the number of licensed users grows. Enterprise & high-volume mail has custom pricing and offers a volume rate card, committed pricing, bulk and API throughput, and named onboarding; it is aimed at organizations with larger or more demanding mail operations.

An eligible workspace receives one 14-day first trial. A qualifying carrier-QR first trial lasts 28 days; trials do not stack, and a workspace cannot receive a second trial.

Platforms

PostBridge is available on web, iOS, Android, and through an API. Users can also work inside ChatGPT. That combination supports teams that need browser access, mobile access, or programmatic connections to their workflows.

Who it's for

Legal, finance and accounting, real estate, and marketing teams are among its intended users. The service also identifies healthcare administration, insurance, collections, public sector, nonprofits, HR and compliance, and professional services. It is most compelling for organizations with repeated postal work, multiple approvers, or a need to retain mailing proof; teams sending only occasional letters may find the subscription and separate usage charges harder to justify.

Pros and cons

• Pros: Approval is required before printing, giving teams a clear checkpoint for quoted jobs.
• Pros: Broad integrations, API tools, and multiple access options can connect mail tasks to existing business processes.
• Pros: Proof documents remain downloadable for seven years, useful for recordkeeping.
• Cons: Postal usage costs extra on top of the monthly or annual plan.
• Cons: The Business/Profile plan includes five licensed members, with additional licensed seats billed separately.
• Cons: The stated USPS limits may rule it out for workflows requiring Priority Mail for new letters or paper PS Form 3811.

Alternatives

Direct Mail Automation Software is a category overview for readers comparing options across postal automation.

Choose Handwrytten if recurring card sending and its monthly card allotments are a better fit: Silver is $100 a month for 24 cards, and Gold is $200 a month.

DocuPost is worth considering for a free entry point: its Free plan supports one user, letters and postcards, and pay-per-mailpiece sending, with DocuPost branding on the cover letter and 90-day retention.

Sincerely offers a free Audit plan for CRM or CSV imports, mailability audits, brand assets, and draft editing, but that plan cannot mail.

Stannp may suit a reader seeking a free web and API plan with one user, one template, 50,000 contacts, and 20 virtual printer items each month.

thanks.io has a pay-as-you-go option with no monthly subscription fee and full API access; gift cards require a higher-tier plan.

ZAP~POST offers a free annual Pro plan with up to 60,000 Zaps per year, unlimited campaigns, two integrations, MFA, webhooks, logs, and insights.

Inkit is a different fit for signature requests: its free plan includes three requests per month, one seat, and 10GB of storage.

Lob Address Verification is an option for readers focused on address verification, with a free Developer plan that includes up to 6,000 mailings and one user.

Verdict

PostBridge is a strong fit for teams with recurring business mail that need approval before print, connected workflows, and durable postal proof. Choose it for that combination of controls and automation, but look elsewhere if you need a free plan, want postal costs bundled into the subscription, or rely on the USPS services it currently excludes.