TL;DR: If you are replacing SigmaOS, the closest options are Fractal Labs, Biographicon, Nugget. 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 SigmaOS (YC Summer 2021).
Last verified:
The three closest alternatives to SigmaOS are:
| Alternative | What it does | Stage | Team | Status |
|---|---|---|---|---|
| Fractal Labs | — | YC Winter 2024 | 4 | Active |
| Biographicon | — | YC Summer 2007 | 2 | Inactive |
| Nugget | — | YC Winter 2020 | 2 | Inactive |
| BrainTripping | — | YC Summer 2012 | 1 | Inactive |
| Mixed Media Labs | — | YC Winter 2010 | — | Inactive |
| Grid | — | YC Summer 2012 | — | Inactive |
| Vote.org | — | YC Summer 2016 | — | Active |
| PlayReader | — | YC Summer 2008 | — | Inactive |
| Volk Wireless | — | YC Winter 2019 | — | Inactive |
| Airshared | TBD | YC Summer 2012 | — | Inactive |
| Insight | The first extensible browser for iOS | YC Winter 2019 | 3 | Acquired |
| Lifelike | — | YC Summer 2023 | 2 | Inactive |
It depends on your size. Fractal Labs is the closest match on what SigmaOS 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.
SigmaOS 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 SigmaOS 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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