TL;DR: If you are replacing Phykos, the closest options are Abatable, Heimdal, Pachama. The table below compares 12 alternatives on what they do, stage, size and status.
Every alternative below is compared on what it actually does, not just its category — so you can see which one genuinely replaces Phykos (YC Summer 2021).
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The three closest alternatives to Phykos are:
| Alternative | What it does | Stage | Team | Status |
|---|---|---|---|---|
| Abatable | Carbon markets platform and solutions | YC Summer 2021 | 35 | Active |
| Heimdal | Affordable and verified direct air carbon capture and storage | YC Summer 2021 | 12 | Inactive |
| Pachama | Restoring nature to solve climate change. | YC Winter 2019 | 85 | Acquired |
| Releaf Earth | Turning food waste into Biochar to remove CO2 from the atmsophere | YC Summer 2017 | 100 | Active |
| SINAI | Enterprise software to quantify cost-effective decarbonization… | YC Winter 2020 | 50 | Active |
| Carbon Crusher | We make carbon negative roads | YC Winter 2022 | 21 | Active |
| AirMyne | Building systems to remove carbon dioxide from air at industrial scale | YC Winter 2022 | 11 | Active |
| ALT TEX | Biodegradable and carbon neutral textiles, engineered from food waste. | YC Summer 2022 | 10 | Active |
| Noya | Radically reducing capital costs and build time for direct air capture | YC Winter 2021 | 7 | Inactive |
| Remora | Carbon capture for vehicles | YC Winter 2021 | 45 | Active |
| Seabound | Carbon capture equipment for ships | YC Winter 2022 | 18 | Active |
| Boost Biomes | — | YC Summer 2019 | 12 | Inactive |
It depends on your size. Abatable is the closest match on what Phykos actually does. If you need something more established, sort the table by team size — larger teams generally mean more support and a longer track record. If budget is the constraint, the earlier-batch companies are usually the ones still competing on price.
Phykos is still operating, so switching is a choice rather than a forced migration. Compare on fit and price rather than urgency.
Every company here is Y Combinator-backed and was matched to Phykos on what it actually does — its own description of its product — rather than on a broad category label. Batch, team size and operating status come from the YC directory and are shown as-is. We do not rank by payment.
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