FoxPlug

Papaya launch: what they're building and where to launch next

What they're building

Continuous optimization for AI agents

Batch
Y Combinator Fall 2026
Industry
B2B
Team size
3
Based
San Francisco, CA, USA

papaya.fyi ↗

See their funding details ↗

Papaya on the record

What they shipped

  • From its YC profile: Papaya is the optimization engine for AI agents. Engineers don't have time to continually improve the agents they've shipped — the context bloat, overly chatty subagents, and broken tool calls sit in production traces nobody reads quietly hurting agent efficiency. With Papaya they connect their agent directly via SDK, get actionable recommendations on how to improve quality, latency, and cost, and the ones they approve are pushed to production as pull requests. Papaya runs 200+ research-backed analyses across context, prompts, prompt caching, subagents, and tool calls. (source)
  • From the Launch YC post "Papaya - Continuous Optimization for your AI agents": Papaya is the optimization engine for AI agents. Connect your production agent and Papaya watches every action, finds what's hurting quality, cost, and latency, and gives you the fix. Once a fix is in place, Papaya makes sure your agent doesn't regress. Teams running Papaya are seeing 20%+ improvements to quality, latency, and cost. (source)
  • Homepage headline: "Optimize your agents at scale ." (source)
  • Homepage description: "Papaya analyzes production agentic workflows across prompts, tools, context, traces, and scaffolding to rank fixes that improve quality and reduce cost." (source)

Pricing and product pages

  • Publishes documentation at https://papaya.fyi/docs. (source)
  • Its pricing page lists $500/month, and mentions a contact-sales option. (source)

Timeline

  1. 2026-09-16: Launch YC post "Papaya - Continuous Optimization for your AI agents", tagline "Papaya finds what's hurting your agent's quality, cost, and latency, and fixes it for you.", 18 upvotes when read. (source)

Other B2B software launches on FoxPlug

  • Perit.AI: Expert-led data and RL platform for AI labs
  • Petrarch: Internal industrial company data for frontier labs
  • Ploy: Ploy turns your website into your company's growth engine.

Where else to launch Papaya

  • Product Hunt ↗
    Self-promotion allowedFree
  • Hacker News (Show HN) ↗
    Self-promotion allowed, within the community's rules
    Audience: Hacker News readers; engineers, technical founders, infra-curious people
  • Indie Hackers Forum ↗
    Self-promotion allowed
    Audience: IndieHackers; bootstrapped solo founders sharing revenue and behind-the-scenes
  • Demand Curve ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • Dev Hunt ↗
    Self-promotion allowedFree
  • No Code Founders ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • OnlineGeniuses ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group
  • Product Makers ↗
    Self-promotion allowed, within the community's rules
    Audience: Slack community; tight-knit, pseudo-private peer group

Is this your startup? Start free

Start free →

After you sign up, your new project setup opens with papaya.fyi filled in, then a short onboarding. Already signed in? It opens the setup straight away. See what each plan includes.

Featured on FoxPlug badge

Featured on FoxPlug: Papaya