ContraPest vs. Evolve
ContraPest vs. Evolve: Same Company, Different Products, Different Deployment Contexts
Both ContraPest and Evolve are made by SenesTech. Both target rodent fertility. Both have produced documented population reductions in real urban programs. Neither is a poison. The differences that matter are in formulation, EPA status, and where each one fits.
What they have in common
Same maker. Same target. Same biology.
Both products are made by SenesTech, Inc. Both target rat fertility rather than killing rats. Both have been deployed in real urban programs and produced documented population reductions.
Neither produces secondary kill risk to wildlife. Both require rats to consume them voluntarily and consistently over multiple weeks for the fertility suppression to take effect.
Side-by-side comparison
The differences that matter for deployment.
| ContraPest | Evolve | |
|---|---|---|
| Formulation | Liquid | Solid soft bait |
| Active compounds | 4-VCD + triptolide | Gossypol (cottonseed) |
| EPA status | Registered pesticide | 25(b) minimum risk, exempt |
| Delivery method | Liquid dispensers / bait stations | Standard bait stations |
| Food environment permits | Compliance review | No special permits |
| City-scale use | NYC, subway trials | Baltimore, Chicago, Hong Kong, SF |
| Retail availability | Yes (starter kits) | Yes (Lowe's, Home Depot, Amazon) |
| Commercial deployment | Licensed applicators, Standard Pest | Cloakd managed program |
| Best suited for | City infrastructure programs, liquid delivery systems | Managed building programs, standard bait stations |
The formulation difference that matters in buildings
Liquid bait competes with everything liquid in a city.
ContraPest liquid requires specialized dispensers and is more susceptible to competition from liquid food sources — standing water, food residue — in urban environments. This is partly what failed in Bryant Park: competing liquid attractants meant the bait wasn't consumed at effective concentrations.
Evolve's solid soft bait sits in standard tamper-resistant stations along rat travel paths. Rats encounter it as a food source, not a water source. In an urban building with managed stations on confirmed travel routes, consumption is more predictable and more consistent.
What the deployment data shows for each
Field results, sourced.
ContraPest
- NYC subway trials: suggested efficacy in reducing brown rat populations.
- Bryant Park pilot: failed (open environment, no knockdown, competing food sources).
- NYC mitigation zone program (2025–present): city-scale deployment ongoing, results pending.
Evolve
- Urban buildings, Aug 2025–Jan 2026: 79% reduction in monitored track presence at Location A; 50%+ at Location B.
- Hong Kong (June 2025): sightings fell within 3 months, no new litters detected.
- San Francisco (June 2025): clear reduction in visible activity, reduced poison usage.
- Baltimore city program (2025): adopted citywide.
Sources: SenesTech, Inc. — February 18, 2026 · SenesTech, Inc. — June 26, 2025
Which one is right for a commercial building program
For most NYC, NJ, and Bay Area operators, the answer is Evolve.
Restaurants, property managers, building owners — the deployment context that matches your building is a managed bait station program, not a liquid infrastructure program.
Evolve fits when
- Standard bait stations work in any building without infrastructure changes.
- EPA 25(b) means no special permits in food-handling spaces.
- Available through Cloakd's managed program without a full licensed commercial pesticide applicator on staff.
- The 79% urban field data is specifically from managed building programs using Evolve.
ContraPest fits when
- City-scale infrastructure programs with existing liquid delivery systems.
- Subways and transit systems where liquid bait stations are already in place.
- Operators with existing licensed applicators who prefer the registered-pesticide regulatory path.
Cloakd deploys Evolve
Managed monthly program — deployment and tracking handled.
Monthly site visits, station maintenance, track count monitoring, and a documented monthly record. Your existing exterminator stays. Program details →
Pick the deployment context that matches your building.
Most commercial operators in NYC, NJ, and the Bay Area are better served by a managed Evolve program. Tell us about your property and we'll outline what deployment looks like.
- Layered onto your existing pest program
- EPA-designated minimum-risk bait
- Documented monthly reporting
- Month-to-month, no long contracts