An old Mumbai place-name
Poisar was not coined for software. Historical and current government records preserve Poisar as a village in Borivali taluka, within Mumbai Suburban district.
About the name
A market system named for a Mumbai river
Poisar takes its name from the Poisar River: an old Mumbai place-name, a living waterway, and an honest metaphor for finding signal in difficult conditions.
The origin story
The name came before the product
A river changed by the city
The river rises inside Sanjay Gandhi National Park. Urban growth, sewage, industrial discharge, and waste later left it heavily polluted and made its renewal a civic project.
A principle for the product
We use the name with respect: face a complicated stream honestly, separate signal from noise, and put guardrails between an insight and an action.
The documented line
From settlement and river to product name
An older form of the name
A late-sixteenth-century account reproduced by the Bombay Presidency Gazetteer uses “Ponçar,” identified there as probably Poisar. It is an early trace, not a proven etymology.
A recorded village
The Thana Gazetteer lists Poisar among the villages of the Goregaon estate. Modern government records continue to identify Poisar as a village in Borivali taluka.
A river through the city
BMC records describe the river beginning inside Sanjay Gandhi National Park, crossing Mumbai's northern neighbourhoods, and meeting Malad Creek.
The name becomes a principle
The product takes the river's name as a reminder to find clear, defensible signals inside a difficult flow of information—and to guard what happens next.
Why Poisar
Signal through the silt.
Pollution is a chapter in the river's history, not its identity. The product borrows the name as a commitment to clarity, restraint, and renewal—not as a joke at the river's expense.
BMC river recordSources
What the historical record supports
The record does not establish the word's literal meaning or whether the river named the village or the village named the river. We keep that uncertainty visible instead of turning it into folklore.
Bombay Presidency Gazetteer
A state-hosted historical account preserving “Ponçar,” identified in the record as probably Poisar.
Thana GazetteerThe 1882 district record listing Poisar among the villages of the Goregaon estate.
Mumbai Suburban DistrictThe current government listing for Poisar village in Borivali taluka, Mumbai Suburban district.
BMC Poisar River projectBMC's river brief documenting the route, contamination, sewage interception, and rejuvenation work.