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Thunderbird vs Signal
Only real listing data — empty facts stay empty.
| Thunderbird | Signal | |
|---|---|---|
| Price | Free | Free |
| Pricing model | free | free |
| License | MPL-2.0 | AGPL-3.0 |
| Open source | Yes | Yes |
| Self-hostable | No | No |
| Platforms | windows, macos, linux, android | windows, macos, linux, android, ios |
| Rating | 4.4★ (85000) | 4.5★ (350000) |
| Repository | Available | Available |
| Last updated | Aug 2026 | Aug 2026 |