| ParrotConsumer | Consumer | San Francisco, United States | | parrotapp.com |
| ParseB2B | B2B | — | | parse.bot |
| Patent WatchB2B | B2B | Toronto, Canada | | patentwatch.ai |
| Patientdesk.aiHealthcare | Healthcare | — | | patientdesk.ai |
| Pax HistoriaConsumer | Consumer | — | | paxhistoria.co |
| PaynaB2B | B2B | — | Aaron Chen | payna.com |
| PerfectlyB2B | B2B | — | | perfectly.so |
| Perseus DefenseIndustrials | Industrials | — | | perseusdefense.com |
| Perspectives HealthHealthcare | Healthcare | Chicago, United States | | perspectiveshealth.ai |
| PhasesHealthcare | Healthcare | San Francisco, United States | | phases.ai |
| PhotoniumB2B | B2B | — | | photoniumoptics.com |
| Pingo AIConsumer | Consumer | — | | pingo.ai |
| Piris LabsB2B | B2B | — | | pirislabs.io |
| Pixley AIConsumer | Consumer | San Francisco, United States | | pixleyai.com |
| Play HealthHealthcare | Healthcare | Boulder, United States | — | playhealth.com |
| Playabl.aiConsumer | Consumer | San Francisco, United States | Hamza Al-Ali | playabl.ai |
| PlaygentHealthcare | Healthcare | San Francisco, United States | | useplaygent.com |
| PlayVisionB2B | B2B | San Francisco, United States | | withplayvision.ai |
| PleomB2B | B2B | — | Royce Arockiasamy | pleom.com |
| PocketConsumer | Consumer | — | | heypocket.com |
| PollenB2B | B2B | — | | pollen.cx |
| PollinateB2B | B2B | — | | pollinate.tech |
| PolymathB2B | B2B | — | | polymathlabs.ai |
| PolymorphB2B | B2B | — | | usepolymorph.com |
| PowerMatrixIndustrials | Industrials | Cambridge, United Kingdom | | pwrmatrix.com |
| PranaHealthcare | Healthcare | — | | pranadoc.com |
| PrimerB2B | B2B | San Francisco, United States | Chris Farestveit | startprimer.com |
| PrismB2B | B2B | San Francisco, United States | | prismvideos.com |
| ProboB2B | B2B | San Francisco, United States | | getprobo.com |
| ProjectXB2B | B2B | — | | projectx.cloud |
| ProliferateB2B | B2B | San Francisco, United States | | proliferate.com?utm_source=yc&utm_medium=referral&utm_campaign=profile |
| ProtentB2B | B2B | — | Srihan Balaji | protent.ai |
| Prototyping.ioIndustrials | Industrials | Sunnyvale, United States | Revanth Bodepudi | prototyping.io |
| ProxB2B | B2B | — | | prox.inc |
| ProximittyFintech | Fintech | — | | proximitty.ai |
| QualGentB2B | B2B | San Francisco, United States | | qualgent.ai |
| QuestomB2B | B2B | — | Abhimanyu Yadav | questom.ai |
| RamAInB2B | B2B | — | | ramain.ai |
| ReacherB2B | B2B | San Francisco, United States | | reacherapp.com |
| RealRootsConsumer | Consumer | San Francisco, United States | | therealroots.com |
| RebulkB2B | B2B | Olathe, United States | | rebulk.com |
| ReframeB2B | B2B | — | | usereframe.ai |
| RellingB2B | B2B | San Francisco, United States | | relling.co |
| RemedyHealthcare | Healthcare | — | | useremedy.co |
| RemixConsumer | Consumer | — | | remix.re |
| Remy AIIndustrials | Industrials | — | | tryremy.ai |
| ReplicasB2B | B2B | San Francisco, United States | | replicas.dev |
| Ressl AIB2B | B2B | — | | ressl.ai |
| Return SignalsB2B | B2B | — | | returnsignals.com |
| REV1B2B | B2B | — | | rev1.so |