How to Build a Custom CRM for Your Business

Why companies build a custom CRM

A CRM is a model of how your company sells and serves customers. HubSpot and Salesforce model the common case well, and for many businesses that is enough.

The symptoms are familiar. Dozens of custom fields nobody trusts, workflows that break on edge cases, a growing bill for seats and add ons, and reps keeping their real notes in a spreadsheet. Tepia’s comparison page build a custom CRM or bend Salesforce helps you decide which side of that line you are on.

A custom CRM makes sense when the process is unusual, when you need full ownership of the data, or when the CRM is the operating system of the business rather than a sales tracker. It does not make sense if you simply have not configured your current tool properly, and Tepia will say so.

Eight steps to build a custom CRM

1. Document how the business actually sells and serves. Tepia’s Discovery phase interviews reps, managers and service staff and investigates the current CRM, producing an Interview Summary and User Stories that describe the lifecycle from lead to renewal.
2. Define the data model. Accounts, contacts, deals or cases, products, activities, tasks and documents, plus the relationships between them. This is the step most teams skip and the one that determines whether the CRM still works in three years.
3. Design the pipeline and stages. Stages, required fields per stage, exit criteria, ownership rules and what triggers an automation. Tepia wireframes the pipeline board and the record views and tests them with two or three reps.
4. Plan permissions and territories. Who sees what, who can edit, how leads route and how managers roll up. Role based access is built into the data layer, not bolted on.
5. Map integrations. Email and calendar sync, telephony through Twilio, transactional email through SendGrid, accounting in QuickBooks, payments through Stripe, marketing tools through Zapier or Make. Tepia’s third party integration review lists each one with its data direction.
6. Build the core, then the automation. Records, pipeline, activities and reporting first. Then sequences, reminders, lead scoring and AI assisted note summaries using OpenAI or Anthropic model APIs.
7. Migrate from HubSpot or Salesforce. Export, map fields, deduplicate, load into a staging environment and have managers validate a sample of records before cutover.
8. Train, launch and refine. Scenario based training, a short parallel run, then a cutover date. Tepia support reps stay on through the first reporting cycle.

Migrating from HubSpot or Salesforce to a custom CRM

Migration is where custom CRM projects succeed or fail. Tepia plans it during Discovery and executes it as part of the Launch phase. The table below shows how standard objects typically map and the issues that come up for each.

Tepia loads data into a staging environment, runs validation reports (record counts, sum of open pipeline, sample spot checks) and only then schedules cutover. Plan on keeping read access to the old CRM for 60 to 90 days.

How Tepia approaches custom CRM development

Tepia’s six phase process fits CRM work closely because the CRM touches nearly every team. Discovery (typically 1 to 3 months) includes a system investigation of your current CRM and connected tools, user interviews across sales, service and leadership, and a third party integration review. Deliverables are an Investigation Summary, an Interview Summary and User Stories.

Design produces a design questionnaire, moodboards, a style guide, detailed wireframes for list views, record views, the pipeline board and dashboards, and sample designs. Development and Testing runs Alpha and Beta schedules with test plans, functional testing against the User Stories, user acceptance testing with real reps and non functional testing for performance on large record sets.

Launch covers data migration, transition from the old CRM and Tepia support reps on the rollout. Full detail is at tepia.co/process.

Features Tepia recommends for a first release

Keep the first release to what reps touch every day. Tepia recommends account and contact records with full activity history, a pipeline board with stage rules, task and reminder management, email logging, a handful of saved views and three to five reports leadership actually reads.

Add automation in the second release once the data is clean: lead routing, follow up sequences, stale deal alerts and AI summaries of call notes. Tepia frequently adds a React Native mobile app at this stage so field reps can log visits and look up accounts without a laptop.

Tepia’s related services include custom CRM development and CRM integration and automation for companies that want to keep their platform and fix the edges.

Frequently asked questions