addletter.com
About
Add Letter , because 95% of newsletters are never read. It's tough keeping up with all the newsletters you're signed up for, and it can be hard to find the ones worth reading. That's why we created Add Letter - A Newsletter Reader App and Newsletter Discovery App. Features that you'll love - 1. Easily read all your subscribed newsletters in one place 2. Discover New Newsletters based on your interest 3. Manage Newsletters right from the App 4. Save your Favourite Newsletter Editions 5. Setup Custom Notification Time 6. Get a Better Reading Experience
AI summary
AI summary coming soon
The profile is visible now, but AI-generated synthesis has not been stored for this company yet.
Methodology →Tech stack hints
API documentation
emptyNo public API documentation matched our discovery patterns yet (pattern matching / AI OS API discovery pipeline is pending or has not stored records for this slug).
Growth signals
emptyComposite score over time (MVP: news-derived mention velocity only).
Growth timeline is waiting for measured AI OS growth scores.
Where this company appears
emptyNo mention sources are recorded yet for this startup.
Developer activity
emptyStack Overflow question counts for the latest stored week. Tags are inferred from this profile’s text (CMS, description, AI notes) — not a full tech stack audit.
No matching tags yet, or the enrichment job has not populated Stack Overflow read models. See tech activity rankings for the global snapshot.
How this company data works
Each field group is shown only when the public portal has a read model or discovery result for it. Missing blocks stay explicit.
| Field | Source | Updated | Status |
|---|---|---|---|
| Profile basics | v_portal_companies_v1 | 2026-05-27 13:49 UTC | ✓ OK |
| Social + GitHub | Enrichment snapshot | 2026-05-27 13:49 UTC | ✕ Missing |
| API documentation | AI OS api-doc discovery | Pending | ✕ Missing |
| Growth timeline | AI OS growth scores | Live relay | ✕ Missing |
| Mentions map | AI OS mentions read models | Live relay | ✕ Missing |