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AI memory tools compared

7 ON THE BOOKS · WATCHED DAILY

Seven boards sit on this track — the most crowded field on the books. Four have raised: Mem0 $24M [3P], Letta $10M at a $70M valuation [3P], Cognee $7.5M [FDR], Supermemory $2.6M [3P]. Combined: $44.1M, and not one public invoice among them. This is a funding-and-stars race, not an invoices race, and the scoreboard is GitHub. The daily tape logged all five open-source repos gaining stars on the same day (07-13): Mem0 +408 over the prior six days, Cognee +376, Supermemory +115, Letta +76, BasicMemory +31 [OBS]. Across the full 07-02 to 07-16 window, Cognee added 1,558 stars — fastest in the field — while Mem0 holds the largest base at 60,923 [OBS]. Positioning from the tape: Mem0 leads on capital and stars; Cognee has the steepest slope; Letta trades on the MemGPT paper and Berkeley pedigree; Supermemory, BasicMemory, Goldfish, and Unabyss fill the local-first and MCP-native niches. Recent movement, all logged: Supermemory pushed 156 changelog pages into its sitemap in one day (07-13), BasicMemory cut its floor price $15 to $12 (07-07), Unabyss rebuilt its homepage top to bottom (07-15) [OBS]. One open call is filed on this track: CALL-0001, Cognee to reach 28,500 stars by 07-27 against a 27,650 baseline. The field is loud. The ledger stays on stars until someone shows revenue.

The field at a glance

BoardEntry priceTraction (verified)
BasicMemory$12/mo
2026-08-29		3.3k stars · Cloud $15/seat [3P] src
Cognee$5 (usage floor)
2026-08-29		$7.5M raised (2026-02) · 12k+ stars [3P] src
Goldfish—
882 Product Hunt votes (day #1) [3P] src
Letta$20/mo
2026-08-29		$10M raised @ $70M valuation · 22k+ stars [FDR]+[3P] src
Mem0$19/mo
2026-08-29		$24M raised · 59k+ GitHub stars · 186M API calls (Q3) [FDR]+[3P] src
Supermemory$5/mo
2026-08-29		$2.6M raised · 28k+ stars [FDR]+[3P] src
Unabyss$13/mo
2026-08-29		659 PH votes (day #1) + ElevenLabs grant [3P] src

Prices carry the date we read them. UNKNOWN means we couldn’t verify — never a guess.

Goldfish — on the books

The Mac-local entry: on-device memory layer from a two-person Swedish team, 989 Product Hunt votes (live check 07-16) and a day-one #1 [3P]. Youngest board here (live 2026-06) and the quietest — the 07-02 log dropped the Free-during-alpha line from the homepage; the counter printed 54,747 on 07-02 and has fluttered between 53,892 and 54,124 since, with no new pages logged after 07-02 [OBS]. No public pricing shipped. The roster carries an open question on whether Apple Intelligence absorbs this niche [INF].

FULL BOARD: DAILY READINGS + CHANGE LOG →

Unabyss — on the books

MCP-native context hub from a roughly six-person Polish team; 659 Product Hunt votes and a day-one #1, plus an ElevenLabs grant [3P]. Loudest marketing motion on the track: 07-15 logged a top-to-bottom homepage rebuild (+307/−178 lines), the synced-items claim moved from 300,000+ to 400,000+, and eleven pages hit the sitemap in one day — four persona landing pages and three comparison pages among them [OBS]. Ship cadence holds: changelog entries v1.4.0 through v1.4.2 appeared on the sitemap 07-16 [OBS].

FULL BOARD: DAILY READINGS + CHANGE LOG →

Mem0 — on the books

Category leader on capital and stars: $24M raised from YC, Peak XV, and Basis Set, with 186M API calls reported for Q3 in the funding coverage [3P]. Star tape: 59,874 on 07-02 to 61,149 on 07-19, +1,275 in seventeen days [OBS]. The content engine runs near-daily — 12 blog URLs added to the sitemap across seven logged days between 07-01 and 07-15, then a Claude-integration push: 'Adding Persistent Memory to Claude with Mem0' took the homepage feed slot on 07-16 [OBS]. The field's first big pricing event landed 07-19: the page was rebuilt and the $79/mo Growth tier removed after 19 stable days — self-serve now runs Free / $19 Starter / $249 Pro with a new usage-based lane in between, and the homepage h1 swapped to 'Build AI that actually knows your users' the same day (live-verified; full case file on the Mem0 board) [OBS].

FULL BOARD: DAILY READINGS + CHANGE LOG →

Letta — on the books

MemGPT commercialized: $10M at a $70M valuation, Berkeley pedigree, paper-first distribution [3P]. Slowest proportional star growth among the five tracked repos: 23,620 to 23,807 between 07-02 and 07-16, +187 on the window [OBS]. Concrete event: 07-02, the pricing page renamed the product from Letta Code to Letta Agent across ten matched lines, and the homepage added a press block citing WIRED, Fast Company, and TechCrunch the same day [OBS].

FULL BOARD: DAILY READINGS + CHANGE LOG →

Supermemory — on the books

$2.6M raised by a 19-year-old solo founder with Google-exec angels on the cap table [3P]. Stars 28,086 to 28,393 on the window, +307 [OBS]; the homepage badge tracks the same climb, ticking 28.3K to 28.4K on 07-15 [OBS]. Concrete event: 07-13, the sitemap jumped 19 to 175 pages — all 156 additions were historical /changelog/ entries exposed to the index at once, with a Changelog nav item added the same day [OBS]. Filed as a changelog-as-SEO-surface tactic, not keyword pSEO [INF].

FULL BOARD: DAILY READINGS + CHANGE LOG →

BasicMemory — on the books

Smallest star base in the field — 3,351 to 3,441 on the window [OBS] — but the only board selling a posted per-seat cloud plan. Concrete event: 07-07, the snapshot series logged the floor price moving $15 to $12 the same day the change log recorded a full pricing-page rebuild with new plan copy and 7-day-trial language [OBS]. Distribution push since: /chatgpt and /claude landing pages plus a post titled about entering ChatGPT Apps and the Claude App Directory hit the sitemap 07-15 and 07-16, and the pricing page added a HIPAA-compliant-infrastructure line on 07-16 [OBS]. Homepage banner now claims 3K+ stars and 57K downloads/month [FDR].

FULL BOARD: DAILY READINGS + CHANGE LOG →

Cognee — on the books

Berlin team, $7.5M seed logged 2026-02 [FDR], and the steepest star slope on the tape: 26,391 to 27,949 between 07-02 and 07-16, +1,558, the field's fastest gainer [OBS]. Concrete event: 07-01, the pricing page renamed its tiers Hobby/Growth to Free/Standard while holding the $2.50-per-1M-tokens rate [OBS]; a Berkeley Xcelerator 2026 cohort announcement hit the sitemap 07-15 [OBS]. One open call rides on this board: CALL-0001, stars at or above 28,500 by 07-27 against a 27,650 baseline, filed 70% STRONG — at the 07-16 reading of 27,949, the gap is 551 stars in eleven days [OBS].

FULL BOARD: DAILY READINGS + CHANGE LOG →

The watch line on this race

This race runs on funding and star velocity, not invoices — when does the first invoice signal land?

NEXT SIGNAL: Any board on this track publishing a verifiable revenue figure. Until then the tape is star velocity (CALL-0001) and pricing architecture — Mem0's vanished mid-tier being the latest move.

STOPS MATTERING IF: Two boards publishing verified revenue would retire this framing entirely.

A READ WITHOUT A NEXT SIGNAL IS JUST AN OPINION — THIS ONE IS FILED IN ADVANCE, LIKE EVERYTHING ELSE ON THE DESK.

Graveyard note

Coqui (r008) is filed under a different track — AI voice — but its cause-of-death reads straight at this field: $3.3M, one round, dead 2023-12, ledger entry "mistook open source for a moat" [FDR]; five of these seven boards lead with a star count, and stars are distribution, not defense.

Sources on this page

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