The game is somewhere between Stalker and Tarkov but I'd say it's more Tarkov than Stalker. Stalker is more focused around mutants, anomalies and artifacts, none of which are in this game. The only things that separate this game from Tarkov is the lack of online component and no map timer. Tarkov is also moving towards a zoned open-world so I think the comparison with Tarkov is perfectly fine.

And the developer has mentioned both as inspiration:

In terms of other games, Road to Vostok takes inspiration from titles Stalker Anomaly, DayZ, Project Zomboid and Escape from Tarkov.