TL;DR: If you are replacing Sieve, the closest options are David AI, Operand, Plutis. 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 Sieve (YC Winter 2022).
Last verified:
The three closest alternatives to Sieve are:
| Alternative | What it does | Stage | Team | Status |
|---|---|---|---|---|
| David AI | Data for audio AI | YC Summer 2024 | 10 | Active |
| Operand | — | YC Winter 2025 | 8 | Active |
| Plutis | — | YC Winter 2023 | 2 | Active |
| Demospace | — | YC Winter 2023 | 2 | Inactive |
| Hey Healthcare | — | YC Summer 2019 | 1 | Inactive |
| Galaxy | — | YC Winter 2021 | 2 | Inactive |
| Eivod | — | YC Summer 2007 | 51 | Inactive |
| Vellum | — | YC Winter 2023 | 23 | Active |
| Lightwell | — | YC Summer 2019 | 4 | Inactive |
| Stackq | — | YC Summer 2009 | — | Inactive |
| BitSample | — | YC Winter 2008 | — | Inactive |
| Bayes | — | YC Summer 2019 | 4 | Acquired |
It depends on your size. David AI is the closest match on what Sieve 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.
Sieve 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 Sieve 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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