VoIP and SMS integration layer for mid-market CRMs

A sales ops manager realizes their CRM technically lists a VoIP integration, but the phone system — say, Gamma Horizon — won't publish the SIP details needed to make it work. They spend weeks in a ticket queue between two vendors, each blaming the other. The CRM vendor has no real incentive to fix this: they can point to a checkbox that says 'VoIP supported' and move on. The phone vendor doesn't care about one customer's CRM workflow. The buyer — the IT manager or sales ops lead — is different from the user (the sales rep), so the pain is diffuse enough that nobody escalates it loudly.

The existing integrations inside these CRMs are built generically — they support the big-name VoIP brands, skip the regional or mid-market ones, and provide zero fallback when the handshake fails. There's no logging, no error explanation, no workaround path. When an SMS integration is obscure, there's no documentation beyond a setup wizard that assumes a configuration the user doesn't have.

Without a working phone-to-CRM connection, reps manually log every call. At 20 calls a day across a 10-person team, that's hours of daily data entry — and the CRM data is stale the moment it's entered. The need recurs every time a company changes phone providers, adds a new CRM seat, or migrates to a new plan. That churn is constant.

What to build

Build a middleware connector that brokers the authentication and SIP/webhook handshake between mid-market VoIP providers (including Gamma Horizon, 8x8, and similar) and CRMs like Agile, AllClients, and Altvia — with a diagnostic layer that logs exactly where a failed connection broke and suggests a fix in plain English.

Where to start

Start exclusively with Gamma Horizon users, since that specific complaint is named and unsolved — a single working connector there gives you a reference case that no CRM vendor has built, and early customers will actively refer you to peers in the same telecom ecosystem.

The hard part

Getting the SIP and webhook documentation from the VoIP providers — many mid-market phone vendors treat their API specs as proprietary and will not cooperate unless you have enough customer leverage to matter to them.

How it makes money

Monthly subscription per CRM instance connected, priced at $49–$149/month depending on number of seats and VoIP providers linked; a one-time setup fee for custom or undocumented VoIP configurations.