Topicbox
Team email and group discussion made simple by Fastmail
Founded
2017
Starting Price
$0
Category
Collaboration
Last updated March 25, 2026
About Topicbox
Topicbox is a hybrid group messaging tool from the makers of Fastmail that combines email and web-based discussion forums. Teams can organize conversations into groups, control email delivery preferences, and maintain a searchable archive of all communications for better knowledge management.
Pros & Cons
Pros
- Works with any existing email client - no new software to learn
- Searchable archive preserves institutional knowledge for easy onboarding
- Flexible per-member delivery preferences reduce email overload
- Built by the trusted Fastmail team with strong privacy focus
- 20% discount for existing Fastmail customers
Cons
Key Features
Hybrid Email & Web Forums
Members can read and respond to messages through their preferred email client or directly on the web interface
Unlimited Groups
Create unlimited discussion groups to keep conversations organized by topic, team, or project
Customizable Delivery Options
Each member can choose to receive every message, daily summaries, or no email at all per group
Searchable Archives
Full searchable history of all communications for onboarding and knowledge retrieval
Privacy Controls
Set groups as public or private with fine-grained access controls for members and visibility
Custom Domain Support
Business plan includes custom domain support for branded group email addresses
File Attachments
Share files within discussions with storage included on Business plans
Pricing
Free Trial
$0
- Up to 20 users
- Unlimited groups
- Web archive
- No credit card required
Business
$20/month
Best For
Small Business Team Communication
Replace long CC chains with organized group discussions that everyone can search and reference
Community & Association Management
Manage member communications for nonprofits, religious organizations, and educational groups
Open Source Project Coordination
Create public and private groups for project contributors and maintainers
Client Project Management
Create per-client groups with full project history accessible to new team members
