Alternatives to OpenSeaMap

Free community nautical chart built on OpenStreetMap, with seamarks, harbours and depth data. The listings below can replace it for an important use case. Each note says what changes if you switch.

  • OpenSeaMap

    Free community nautical chart built on OpenStreetMap, with seamarks, harbours and depth data.

    FreeProprietaryWeb

Replacements

Listings that take over the same core job as OpenSeaMap.

  • OpenCPN

    A free, open-source chartplotter and marine GPS navigation program for laptops and onboard computers.

    FreeOpen sourceWindowsmacOSLinuxAndroid

    OpenCPN is a free open-source chartplotter for Windows, macOS, Linux and Android that uses chart sets you obtain, including OpenSeaMap downloads, rather than a web chart.

  • Aqua Map

    A marine navigation app for boaters that shows NOAA, USACE and CMOR charts with offline use.

    FreemiumProprietaryAndroidiOS

    Aqua Map shows official NOAA, USACE and CMOR charts offline on Android and iOS, but it is freemium, closed source and focused on US waters and the Bahamas.

  • Argo

    A marine navigation and trip planning app with nautical charts, autorouting and a boaters' community.

    FreemiumProprietaryAndroidiOSWeb

    Argo includes nautical charts in its free plan on web and mobile, with offline charts and crowdsourced reports, but it is a proprietary service rather than community-editable chart data.

  • iNavX

    A marine chartplotter app for iPhone and iPad with charts from many providers, AIS and GRIB weather.

    FreemiumProprietaryAndroidiOS

    iNavX includes free NOAA US charts and supports over 25 chart providers on phones and tablets, with AIS and GRIB weather, but commercial charts are bought separately.

Similar software

Related functionality, not a direct replacement.