Handshake S Verified

RL environment company · Multi-Domain

Domains
Multi-Domain
On X
@joinhandshake ↗
Tier
S why
Snapshot

Open environment ↗joinhandshake.com/research/ai/

What Handshake does

Handshake supplies human expert data and agentic training environments, graders and benchmarks to AI labs, drawing on its network of students and professionals.

Leads with
Several domains (a generalist)
Based in
San Francisco, USA
Team
250+

What Handshake sells

Read from Handshake's own website, checked October 11, 2026: the line that puts it in each category.

RL environments

Data

Domains Handshake covers

Handshake competitors and alternatives

The companies that sell the most of the same things in the same domains, and what they share with Handshake.

Every RL environment company on the landscape map →

Tier S

S

Category leader: 200+ people, $100M+ raised or a $1B+ valuation.

How much stands behind a tier: usage, who backs it, a confirmed line from its own site or paper, and a clear read on X. High with three of the four, medium with two, low otherwise.

  • team 250+
  • investors: Kleiner Perkins, Notable Capital
  • in curated RL directories (3 pts)

On X · mixed, moderate buzz, from 14 posts about Handshake in the last month

Chatter is mostly gig workers promoting account-farming and tasking schemes, raising quality and fraud concerns; little discussion from labs or AI researchers about its data.

@Iamceejaymac ↗ · @wangai_johnn ↗ · @Laff38 ↗

How we got to tier S
  1. Adoption: team 250+; investors: Kleiner Perkins, Notable Capital. Tier S.
  2. On X: mixed, moderate buzz. “Chatter is mostly gig workers promoting account-farming and tasking schemes, raising quality and fraud concerns; little discussion from labs or AI researchers about its data.” No move.
  3. In curated RL directories: 3 points, a floor of none.
  4. Confirmed: a line from its own site or paper places it.

A clear view on X moves a tier one step up or down; most entries don't move. How tiers work.

Handshake funding

Backed byKleiner Perkins

Funds 2

  • Kleiner Perkins
    When Mamoon Hamid, the Midas List investor at Kleiner Perkins, got the call from Lord last December
    1. Read: “When Mamoon Hamid, the Midas List investor at Kleiner Perkins, got the call from Lord last December”
    2. Found word for word on a page found by search: upstartsmedia.com/p/handshake-refounding-layoff-ai
    3. Also named by 1 other page read
    upstartsmedia.com/p/handshake-refounding-layoff-ai
1 more, low confidence
  • Notable Capital
    His board director Jeff Richards, an investor at Notable Capital, agrees.
    1. Read: “His board director Jeff Richards, an investor at Notable Capital, agrees.”
    2. Found word for word on a page found by search: upstartsmedia.com/p/handshake-refounding-layoff-ai
    3. No other page or directory names it yet
    upstartsmedia.com/p/handshake-refounding-layoff-ai

Every figure is quoted from its own site, its accelerator or a funding announcement; a round's amount and lead appear only when its quote states them. Startup databases are never used as evidence. Checked 2026-10-11. How funding is checked.

Where Handshake sits

Its domain on the map, live. Hover a logo for its name; click to open it. Open it on the full map

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Latest from Handshake on X

@joinhandshake ↗

More Multi-Domain RL environments

Multi-Domain AI benchmarks

Next: browse all environments. Entry from the RL Research daily scrape of public sources, 2026-11-05 snapshot.