Conditional-commitment infrastructure · Est. 2024
“I’ll do it if you will.” Some actions only make sense if people act together. Spartacus.app helps groups form, grow, reach a threshold for impact, and move in unison when they do.
§ 00 Built for
Joint safety commitments, coordinated disclosures, deployment pacts, activated only when peer labs commit alongside.
Methodology shifts, publication norms, alignment focus pledges, with the cover of cohort commitment rather than first-mover risk.
Cross-ideological joint statements, legislative mobilizations, group sign-ons; temporary anonymity until the coalition is whole.
§ 01 Letters of intent
Non-binding letters of intent from organizations scoping pilots across AI safety, research, coalition-building, labor, and the creative industries.
Community members hold genuine private willingness to take a high-impact action … but defer in the absence of visible critical-mass commitment from peers, producing equilibria in which latent willingness does not translate into action.
Individual researchers would commit to pursuing a specific research direction … if they could see sufficient peer commitment … but no individual researcher is positioned to be the first mover, particularly where career incentives and publication competition punish unilateral commitment.
A prospective signatory or coalition partner would endorse a joint statement, public letter, or policy ask if they could see sufficient counterparts from other ideological quadrants were also endorsing — but no one wants to be the first signer from their tribe on a document with the other tribe.
From the perspective of game theory, this is a textbook use-case for an assurance-contract mechanism. … As a researcher, it’s clear to me that the Spartacus team understands the core economic theory underlying collective action problems.
We took part in the December 2025 march2testify mobilization that Spartacus.app helped power, and are now talking to the team about leveraging their platform for a new campaign once our report is published.
When a tracked bill enters a committee hearing or floor vote window, a threshold-based Spartacus campaign would mobilize coordinated testimony, constituent outreach, or coalition sign-ons, with temporary anonymity protecting participants until the commitment threshold is met.
Spartacus is the only team I’ve encountered treating coordination failure as a tractable design problem rather than a cultural lament, and I’d like to see them resourced to build it.
Spartacus.app received an ACX Grant in 2024 to build conditional-commitment infrastructure (think dominant assurance contracts) for collective action problems. I’m still excited about this category of product and impressed by Jordan’s commitment and work ethic.
§ 02 How it works
Pick a template or build your own. Define what people commit to: testimony, a pledge, a public sign-on, a behavior change, or a financial commitment. Set the participation threshold that has to be met before anyone’s commitment activates, and whether participants stay anonymous until that threshold.
People pledge under the protection of the threshold. Temporary anonymity until threshold means they don’t carry first-mover risk: their commitment becomes binding and public only if enough peers commit alongside them.
The campaign goes live. Everyone moves at once, in coordinated cohort, with the visibility of critical mass already established. No false starts. No symbolic gestures. No one standing alone.
§ 03 Examples
Each is a conditional-commitment template: a clear ask, a defined threshold, an activation rule. Use them as starting points, or talk to us about the specifics of yours.
§ 04 Or build from scratch
Don’t see your situation in the templates? The Spartacus.app campaign builder turns a coordination problem in plain English into a launchable conditional commitment: it surfaces the right threshold logic, suggests the participant cohort, helps you decide what level of anonymity is appropriate, and drafts the framing that will resonate with prospective signers.
For high-stakes campaigns, our team works directly with you on design and timing, the way we did with the AB 412 mobilization. Get in touch if your coordination problem has acute timing pressure or sensitive disclosure requirements.
§ 05 The mechanism
Wherever private willingness outruns public action:
In every case the bottleneck is the same primitive: the absence of a credible mechanism to convert private intent into coordinated public action without disproportionate first-mover burden.
Spartacus.app builds that primitive as reusable infrastructure. It folds into AI safety governance, research norms, cross-ideological coalitions, labor advocacy, whistleblower disclosure, philanthropic coordination, and democratic action, with the same underlying mechanism each time.
Pluralistic ignorance, the false stability of bad equilibria where most privately disagree but assume they’re alone, breaks the moment private intent can be revealed safely, conditional on others.
Threshold + temporary anonymity makes early commitment cheap. The reputational, professional, or political risk of being seen first dissolves into the cost of joining a cohort.
A petition with 10,000 signatures is easy to ignore. 50 frontier-lab employees who all activate the same disclosure on the same day is not.
The same mechanism (threshold-gated, anonymity-protected pledges) works across radically different problem classes. One platform, many coordination problems.
§ 06 Validated case study
California Assembly Bill 412 addressed the risks of generative-AI-driven job displacement for performers. The State Senate Judiciary Committee was scheduled to hear AB 412 at Stanford on December 8, 2025, a narrow window in which public testimony from rank-and-file performers could shape the legislative record.
SAG-AFTRA members were broadly willing to testify, but unwilling to bear the cost of testifying alone. A single voice on a contested AI bill has minimal effect on a committee; the cost of taking time off, traveling to Stanford, and speaking on the record only made sense if a cohort showed up alongside. The classic first-mover problem: private willingness, no public coordination.
Spartacus.app ran a threshold-gated commitment campaign in the weeks before the hearing. Members pledged to testify under temporary anonymity, with the commitment activating only once a participation threshold of 100 testifiers was met. The anonymity protected early movers from professional retaliation; the threshold gave each member confidence that their cost wouldn’t be paid alone.
The threshold was exceeded. 125 SAG-AFTRA members testified on December 8, an unusually large turnout that flooded the hearing with performer voices in support of the bill. The proponent side of the testimony record was substantially dominant. AB 412 remains under consideration in the California legislature.
Independent evidence of the mobilization design: an attestation from Erik Passoja, Protect Digital Identity, who participated in the planning sessions, is on file. Read the full retrospective on our Substack ↗
Jordan Braunstein of Spartacus.app participated in the ideation and planning sessions for the March2Testify mobilization between October and December 2025. His contributions included collaborative discussion of coordination design, threshold-commitment logic, anonymity tradeoffs, and the timing of the campaign against the California Senate Judiciary Committee hearing window for AB 412.
§ 07 FAQ
By default, no. A Spartacus.app pledge is a public commitment to act, reputationally and socially binding once the threshold is reached, but not a legal contract. Campaign organizers can layer in additional binding structures (e.g., contractual sign-on documents, escrow, contingent donations) at their discretion.
Name and email, in an encrypted database. That’s it: no profiling, no behavioral tracking, nothing sold or shared.
For anonymous campaigns: no. Organizers see only usernames and the pledge count, with no path to the underlying identity. For non-anonymous campaigns, organizers see participant identities throughout. This is a campaign-level setting the organizer chooses up front.
The campaign activates: names and emails are revealed to the organizer, and the cohort is publicly on the record together.
Nothing activates. Every participant is notified that the campaign closed without crossing threshold, and pledge data is deleted from our systems. The campaign never existed publicly; private intent stays private.
Campaign creators can layer on enterprise-grade controls per campaign: domain exclusions (e.g., only employees of named organizations), AI-powered liveness detection to prevent botting, and government-ID verification for high-stakes campaigns.
Anyone with a coordination problem the mechanism fits. We’ve worked with labor groups, AI safety coalitions, research collectives, and community organizations. For high-stakes or sensitive campaigns (whistleblowing cohorts, legislative testimony, frontier-lab letters), the Spartacus team is available to consult on design and timing; tell us about your situation.
We don’t have set pricing yet; we’re still in the pilot phase, working closely with each early partner organization to make sure the mechanism fits and the outcome lands. Get in touch and we’ll quote against the scope of your campaign.
Team
Founder · Product & Operations
Jordan founded Spartacus.app in 2024 after years bridging coordination-design work and startup operations. He led the December 2025 SAG-AFTRA mobilization for California AB 412 and was a 2024 ACX Grants recipient.
Technical Lead
Aster is a Staff+ engineer with 15+ years of experience, including time at Google and Adobe, plus a decade running independent startups. He leads Spartacus.app’s platform engineering.
Start a campaign in minutes. Or, if your situation is high-stakes or sensitive, tell us about it and we’ll work with you on design and timing.
Talk to us
Pilots, scoping conversations, sensitive disclosure design, partnership inquiries. We respond inside two business days.