Synthetic Humans: 100x Speed, 1% Cost

Every decade, technology replaces a human-powered process with software. Postcards → texts. Blockbuster → Netflix. The next wave: synthetic humans—software that replicates human behavior with the scalability of bits. Deliver what only humans could do at 100x speed and 1% cost.

The arc of technology is clear: we move from atoms to bits, reducing costs and increasing accessibility while often delivering better outcomes.

We stopped writing postcards—we text. We stopped visiting Blockbuster—we press play on Netflix. We stopped fast-forwarding cassettes—we hit "next" on Spotify.

The Next Frontier: Synthetic Humans

Synthetic humans = software that simulates the non-deterministic, nuanced, "human-ness" of people with the programmability, scalability, and instant delivery of digital products.

This isn't science fiction. The convergence of LLMs, computer vision, voice synthesis, and API connectivity has unlocked use cases that previously required real humans:

Research & Testing:

• •Synthetic Users and Roundtable conduct user research without recruiting a single participant—AI personas provide feedback, answer questions, and simulate user behavior
• •Synthetic Traffic generates realistic user sessions for UX testing without hiring testers
• •Fictive and Outset replace the UX researcher entirely—AI conducts interviews through conversational interfaces

Content & Media:

• •Synthesia, HeyGen, and InVideo create virtual presenters for sales videos, training content, and marketing—no actors, no studios, no scheduling
• •Deeptune and Unilingo dub and translate videos into any language without human voice actors
• •Roll.ai automates professional video production through software

Voice & Communication:

• •ElevenLabs, PlayHT, and Deepgram convert text to natural human speech—indistinguishable from real voices
• •Bland.ai, Infinitus, and FleetWorks handle phone calls autonomously—from customer support to appointment scheduling to healthcare coordination

Connection & Companionship:

• •Replika and Character.ai provide social connection and companionship through AI personas
• •Rosebud delivers therapeutic journaling and mental health support at a fraction of therapy costs

What We're Looking For:

Democratize Premium Services: Make the human-powered luxuries of the wealthy accessible to everyone. Personal stylists → AI styling. Executive coaches → AI coaching. Therapists → AI-powered mental health support (Rosebud).

Replicate Human Judgment at Scale: Replace human labor in research, testing, and analysis where speed and cost matter more than perfect fidelity. Paid focus groups → AI user research. QA testers → synthetic users. Research analysts → AI research assistants.

Enable New Forms of Creation: Unlock creative expression for people who couldn't access traditional mediums. $100K motion capture studios → Hallway. Professional video production → AI video generation.

Automate Human Interfaces: Build "APIs" that handle the phone calls, emails, and human coordination that can't be digitized any other way. Healthcare phone calls → Infinitus. Sales development → AI SDRs.

The 100x/1% Test:

For every startup in this category, we ask: Are you delivering 100x the speed, 100x the scale, or operating at 1% the cost of the human-powered alternative? If yes—and the output is good enough—you're building the future.