Are there any open source alternatives to enterprise email software that we can self-host to keep our customer data completely private and secure?
Download run
Fan-out diagram
The searches the AI actually ran for this prompt.
SEED QUERY
Are there any open source alternatives to enterprise email software that we can self-host to keep our customer data completely private and secure?
2 real searches · 1 real-search pass
Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.
Query classes
Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.
ChatGPT real searches (2)
Classes come from the query-classifier (a local Laya model). 2 of 2 calls are low-confidence (under 50%) — hover a query in the table to see its confidence.
Searches and sources
ChatGPT2 real searches · gpt-6
best open source self hosted email server groupware mailcow stalwart mailu 2026 Google ↗
open source self hosted email marketing transactional email platform listmonk mautic postal 2026 Google ↗
- Official website · mailcow.email
- Official website · stalw.art
- Official website · mailu.io
- Official website · iredmail.org
- Official website · listmonk.app
- GitHub repository · github.com
- Official website · mautic.org
- Official website · keila.io
- Official website · postalserver.io
- Open-Source Email Platforms: 7 Self-Hosted Tools · elma.sh
- Self-Hosted Email Server: 8 Options Compared · elma.sh
- 12 open-source alternatives to Mailchimp (2026) · selfhosthub.dev
- Open-source transactional email platforms (Oct 2026) · repoquarry.dev
- Open-source Gmail alternatives you can self-host · opentools.dev
- Self-hosted email and groupware with open source · deployopen.com
Queries
2 queries · click a column to sort
| Query / type | Search | Intent | Query class | Routing format | Cluster | Freq ↓ | Weight |
|---|---|---|---|---|---|---|---|
best open source self hosted email server groupware mailcow stalwart mailu 2026 OBSERVED | Google ↗ AI Mode ↗ | — | Comparison | — | — | 1x of 1 | |
open source self hosted email marketing transactional email platform listmonk mautic postal 2026 OBSERVED | Google ↗ AI Mode ↗ | — | Other / navigational | — | — | 1x of 1 |