2024年Q3 Tab Inc. (米San Francisco・2024年Avi Schiffmann直接競合 Personal Memory AI startup・Friend AI Pendant類似 hardware approach + 差別化Productivity focus + Memory-first positioning) 発表のTab AI Necklace・$99 standard hardware + $19/月 subscription (Limitless / Bee / Friend同 price-tier・Productivity AI Wearable positioning)・Always-listening Necklace form factor (Pendant strap改良 + Necklace wear style + 36 hour battery + Multi-day continuous wear便利性向上) + Personal Memory AI (All conversations + Meetings + Calls comprehensive recall + Multi-day conversation memory + Search across entire conversation history + Conversational query interface "What did I say about X yesterday?") + Multi-language + Cloud processing・Memory-first user segment + Knowledge worker memory augmentation needs。