Most people searching for a "Sonnet alternative" are there for the
same reason: the original idea - a small radio paired to your phone
for messaging and location with no signal - still appeals, but
Sonnet itself can't be bought new, and the units that shipped are
often hard to use (see
Does Sonnet Mesh Still Work?).
Nelos connects your phone to a small compatible
radio and gives your group chat, direct messages, an identity
that's yours rather than tied to a device, offline maps, trackers,
location history and a Need Help button - a finished, actively
maintained app, not a crowdfunded prototype. You can start using it
for free.
What Sonnet set out to do
Sonnet was a rugged pocket device that connected to your phone by
broadcasting its own Wi-Fi access point, which you then used through
a browser. It used a proprietary radio protocol to send short
messages, voice recordings, images and GPS coordinates, and the
devices were meant to relay through each other to extend range. It
also worked as a power bank. No subscription. It's the familiar
model: the phone is the interface, the radio is the transport.
The directions you can move to today
Smartphone + LoRa mesh
This is the closest thing to Sonnet's concept. Each person carries a small LoRa radio paired to a phone over Bluetooth; the radios talk directly to each other, and a repeater can relay for anyone out of direct range. Unlike Sonnet, this isn't one company's product - LoRa is an open radio technology with many hardware makers and several apps. You get group messaging and location on an offline map, usually with no subscription for the radio link. What to know: it suits text and location, not voice or images; range depends on terrain. See What Is a LoRa Mesh Radio?
Satellite messenger
A satellite messenger (Garmin inReach, Zoleo and similar) connects
straight to a satellite network. It reaches outside your group and
can send an SOS to a rescue coordination centre - something neither
Sonnet nor LoRa mesh can do. The trade-offs: a monthly subscription,
a higher price, a slower pace. See
LoRa Mesh vs Satellite Messenger.
Two-way radio
If what you wanted from Sonnet was mainly to talk at close range, a
two-way radio is simpler and much cheaper. No phone, no pairing, no
app - but also no map, history or location, and range collapses with
terrain. See
LoRa Mesh vs Walkie-Talkie.
The other crowdfunded devices of that era
Sonnet was part of a wave of crowdfunded "phone + off-grid radio"
devices around 2016-2017, alongside goTenna Mesh and
GOTOKY. goTenna Mesh
has left the consumer market;
Best goTenna Mesh Alternatives
walks through the same set of options from the goTenna angle.
Quick comparison
| Option |
What it's for |
Main limit |
| Phone + LoRa mesh | Group messaging and location with no signal, no subscription | Text/location, not voice; reaches the group only; range depends on terrain |
| Satellite messenger | Reaching outside the group and calling for rescue from remote areas | Subscription, higher cost, slower messaging |
| Two-way radio | Instant voice at close range | No map/history/location; terrain limits range hard |
Where Nelos fits
If what you liked about Sonnet was the model - a familiar phone
interface plus an external off-grid radio - Nelos delivers that
model today: it runs on compatible radios from several makers,
and gives your group messaging, everyone's location on an offline
map, device trackers and a "Need Help" button that alerts your own
group. You can start using it for free, with no account. Nelos
doesn't lock you into one hardware maker the way Sonnet did.
For the wider picture, see the
off-grid communication guide;
for hardware, see
off-grid communication devices; and
Getting Started covers setting up
a group. If you liked the Sonnet idea specifically,
the Sonnet off-grid communicator concept, done today
starts from that use case.