TL;DR: If you are replacing Neptune.io, the closest options are Operand, Plutis, Demospace. 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 Neptune.io (YC Summer 2014).
Last verified:
The three closest alternatives to Neptune.io are:
| Alternative | What it does | Stage | Team | Status |
|---|---|---|---|---|
| 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 |
| Holy Grail | — | YC Summer 2019 | 7 | Active |
| PetaSales | — | YC Winter 2009 | 2 | Inactive |
| Snapboard | — | YC Winter 2020 | 2 | Inactive |
| Galaxy | — | YC Winter 2021 | 2 | Inactive |
| Kestroll | — | YC Summer 2025 | 2 | Active |
| Fithub | — | YC Winter 2010 | — | Inactive |
| Insoshi | — | YC Winter 2008 | — | Inactive |
| Thinkature | — | YC Summer 2006 | — | Inactive |
It depends on your size. Operand is the closest match on what Neptune.io 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.
Neptune.io is no longer listed as active, so anyone still relying on it should plan a migration to one of the alternatives above.
Every company here is Y Combinator-backed and was matched to Neptune.io 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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