About
Engineered communication infrastructure for modern contact centers
NSSSoft Technologies is a telephony & CRM engineering company. We build customized communication stacks on open-source cores (Asterisk, FreeSWITCH, OpenSIPS) tailored to each client's scale, compliance zone, and workflow. We ship both cloud and on-premise deployments.
85+
Clients across India
1,200+
Agents on our platform
40 lakh+
Calls handled every month
Open-source core, enterprise hardening
We don't wrap a vendor product with a branded skin. We own the Asterisk, FreeSWITCH, and OpenSIPS configs, monitor them and push updates ourselves.
India-based engineering, global delivery
Our engineers are based in Ghaziabad with experience deploying production systems in India, the GCC, SEA, and Europe.
Built-to-spec, not off-the-shelf
Every deployment is customized to your dialplan, compliance zone, and CRM. We don't up-sell features you don't need.
What we actually do
NSSSoft started as a FreeSWITCH consulting practice. Over time, we built a repeatable deployment framework for outbound-heavy contact centers — one that handles the parts that hosted dialers consistently get wrong: custom DNC logic, internal-CRM CTI, and carrier-specific AMD tuning.
Today we design, build, and support the full communication stack — from the carrier SIP trunk at the edge (OpenSIPS SBC) through the media server (FreeSWITCH / Asterisk), the dialer engine, and the agent-facing CRM — as a single engagement.
Our clients include BPOs, NBFC collections teams, insurance telesales, edtech admissions desks, healthcare appointment reminder services, and ITSPs building their own hosted PBX products.
Our differentiators
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