Lockbin

Overview

Lockbin is a browser-based service for sending private messages and files, best suited to organizations that routinely handle sensitive information. Its strongest case is secure, password-gated delivery without installing software; teams that need a native Gmail or Outlook integration should look elsewhere.

Messages use TLS in transit and FIPS 140-2 verified AES-256 encryption at rest. Lockbin says decryption keys are not stored on its servers in plaintext, and that data is held in the United States in a redundant cloud facility with physical security and access controls. These are meaningful safeguards for sensitive exchanges, though organizations needing a Business Associate Agreement must request one and choose a qualifying paid plan.

Recipients can open messages through a unique URL and password, while known recipients can use passwordless secure links. The service works in Chrome, Firefox, Safari, or Edge on Mac, Windows, or other operating systems, with no download or install required. It works alongside Google Workspace and Microsoft 365, but that is not the same as direct Gmail or Outlook integration.

Key features

• Controlled recipient access: Password protection adds a deliberate access step after delivery; passwordless links for known recipients offer a lower-friction option where appropriate.
• Message and file cleanup: Uncollected messages are destroyed after six months. Read files not marked for deletion are removed within 24 hours, a useful boundary for temporary exchanges rather than long-term file storage.
• File collection: Premium users can create a hosted file-drop link or embed a custom secure form so people can submit files without an account or password. That suits inbound document collection, but the free plan does not include this feature.
• Compliance support: Premium and Enterprise customers can request a signed BAA, and Lockbin commits to breach notification within 60 days. Professional-tier users can contact support by phone through their account; current users can email support for immediate assistance.
• Administration: Enterprise adds shared address books, admin compliance copies, and bulk user import, while admin access controls are available as a product feature.

Pricing

Lockbin uses a freemium model and advertises 10 free messages with no credit card required. The Free plan costs nothing, is billed for one user, and includes a 25 MB attachment limit and six months of inbox storage. It is a sensible way for an individual to try secure delivery, but the small attachment allowance and message offer make it a limited fit for regular organizational use.

Premium costs $10 a month, billed monthly, for one user. It permits up to 20 attachments per message, uploads up to 100MB, has no pre-set storage limits, and offers a BAA by request. For a solo professional sending larger or more frequent files, that is a more practical tier; it still does not provide multi-user administration.

Multi-User Enterprise also costs $10 a month, billed monthly, and includes unlimited users, a shared address book, admin compliance copies, bulk user import, and uploads up to 1GB. Those collaboration and oversight features make it the relevant tier for teams. The stated price is notably the same as Premium despite the broader seat allowance, though organizations should assess the included limits against their own workflow before committing.

Platforms

Lockbin runs in major browsers and supports Linux, macOS, Windows, and web use. The no-install approach is convenient across mixed-device environments, but the absence of direct Gmail and Outlook integration may interrupt teams that expect secure sending inside their existing mail client.

Who it's for

Lockbin is aimed at medical and dental organizations, CPA firms, finance teams, and government organizations handling sensitive information. It is strongest for people who need password-controlled message delivery or a way to collect files securely through a web form. It is less suitable for users whose priority is native email-client integration or for teams that need to retain collected files beyond the stated cleanup windows.

Pros and cons

• Pro: Password-protected access, optional passwordless links for known recipients, and encryption in transit and at rest give senders several layers of control over sensitive exchanges.
• Pro: Browser access across operating systems avoids installation requirements, and paid file-drop links support account-free submissions.
• Pro: The Enterprise tier includes unlimited users and administrative compliance tools at the same stated monthly price as the one-user Premium tier.
• Con: The free plan is capped at 25 MB per attachment and six months of inbox storage, limiting its usefulness for larger or recurring work.
• Con: Direct Gmail and Outlook integrations are absent, which can make Lockbin a less natural fit for teams centered on those clients.
• Con: A BAA is available only on paid plans and by request, so organizations needing that agreement must account for an added purchasing step.

Alternatives

For broader browsing, see Email Encryption Software and File encryption tools.

• DataMotion Secure Email Exchange is worth considering if an enterprise-oriented secure email exchange with Android, iOS, API, and web platforms is a better match; its plan uses custom pricing.
• SecureMyEmail may suit users who want coverage across Windows, macOS, iOS, and Android, with a free plan for one email address.
• Encryptomatic OpenPGP is a Windows option for business or government users who prefer a $29.99 a year single-license subscription.
• gpg4o is a Windows alternative centered on OpenPGP and Microsoft Outlook support.
• Gpg4win is a free Windows alternative.
• Mailvelope may be a better fit for users seeking a browser extension or web-based option, with a Business plan at €3 a month per user for 1–49 users.
• PDF Postman is a Windows alternative for users looking for a single-license option priced at $79.99 a month.
• c.Email is a free extension-based alternative.

Verdict

Choose Lockbin if your priority is password-controlled delivery of sensitive messages, with browser access and paid options for file collection and team administration. Its strongest appeal is the combination of recipient controls and practical file workflows; look elsewhere if direct Gmail or Outlook integration is essential, or if the free attachment cap is too restrictive.