Custom Software vs Filevine or CASEpeer for PI Law Firms

The short answer

For a personal injury firm, Filevine or CASEpeer is enough while your cases fit its standard PI workflow; custom software is better for the steps either one leaves outside the case file, built on its API rather than replacing it.

Both platforms are built for this work. CASEpeer is made only for plaintiff-side personal injury firms, with treatment tracking, settlement and lien management and PI reports out of the box. Filevine serves several practice areas and gives PI firms dedicated matter types and document-request tracking. It also offers LOIS, its AI system for drafting demands from the file.

So you're rarely deciding which one to replace. You're deciding which steps your firm still runs in spreadsheets and inboxes. Then you check whether the platform's API lets a custom tool write that data back or only read it. That split decides how much a build can do for you.

Side by side

Filevine or CASEpeer vs custom software, step by step

Decide per step of the case, not per vendor. Facts about each platform come from its own site and help center, read in October 2026.

Step	Filevine or CASEpeer	Custom software built around it
The PI case lifecycle	Ships it. CASEpeer covers intake through settlement and distribution. Filevine's PI matter types track which providers and insurers still owe you documents.	Doesn't try to. Your platform stays the case file, and a build covers only the steps you scope.
Medical records and demands	Filevine offers record retrieval with Codes Health inside the platform and LOIS drafting from the file. CASEpeer connects to EvenUp, Novo and Arctrieval.	Worth building only where your demand format or provider follow-up differs from what those tools already do.
Intake before a case exists	CASEpeer adds intake on Pro, and case grades and an intake portal on Advanced. Filevine has its own leads and intake module.	Routing by your own rules across offices, co-counsel or partner firms, whatever the lead source.
Reports	CASEpeer reports cases by stage, intake conversion and time to settlement, and lists marketing ROI tracking among its uses. Filevine's dashboard shows status, requests, deadlines and limitation alerts.	Read-only reports that join the case data with ad spend and accounting.
Reading data out	CASEpeer's Data Sync API, on Advanced, is read-only. Filevine's v2 API reads through a gateway, with a client ID and secret your firm can create.	Reads on a schedule into the report or tool that needs it. Nothing is written back.
Writing data back	CASEpeer's Partner API creates and updates a limited set of records. Filevine's API can upload a document, and acts with the permissions of the service account you set up.	Writes only through those endpoints. Where none exists, staff accept a reviewed entry instead of retyping it.
Who supports it	Each vendor supports its own platform. CASEpeer says it doesn't give direct support for API implementations.	Senior engineers who built it, the first two months of maintenance included, then a written service level or a trained handover.

When Filevine or CASEpeer is enough

Where the platform wins

Your cases move through the stages the platform already ships: intake, treatment, demand, settlement and distribution.
Record requests and demand drafts are covered by Filevine's LOIS and Codes Health, or by CASEpeer's EvenUp, Novo and Arctrieval integrations.
Partners run the firm on the built-in numbers, like cases by stage and time to settlement, and nobody rebuilds them in Excel each month.
Settlement math and lien tracking stay inside a system your staff already know, which is where that money work belongs.

Its limits

Intake rules that route a case across offices, co-counsel or partner firms rarely fit a single intake form.
Spend pulled from each ad account and fee splits from your books, joined case by case, go past the built-in ROI view.
A step only your firm runs gets pushed into tasks and reminders, and someone still tracks it by hand.
API access has limits: CASEpeer's API comes with the Advanced tier, and Filevine's default credentials carry restricted rate limits.

When custom software wins

Where a build wins

You route cases by your own rules: practice area, state, case grade, office or referral partner. Lexpair, the legal platform we built, sorts each case by practice area and matches it to a lawyer.
One read-only report joins spend per ad account and per referral source with fees in your accounting system. The cost of a signed case then comes from one place.
A step that's yours alone, like a co-counsel portal or a referral-fee ledger, gets its own tool. It writes the result back to the case where the platform's API has an endpoint for it. Where it doesn't, the result waits in a queue for staff to accept.
You own the code, and changes follow your firm's process rather than a vendor roadmap.

What it costs you

Write-back is only as wide as the API. CASEpeer's Partner API endpoints are limited, so some results land in a review queue for staff.
Each step is a real project: a Blueprint, then a build accepted against written criteria.
Someone maintains the integration as Filevine or CASEpeer change their APIs.
A firm whose work fits the standard PI workflow gains little from it.

Reads and write-backs

What a custom tool can read, and what it can write back

On its Advanced tier, CASEpeer splits reading and writing into two APIs, and a good build keeps the two apart on either platform.

01Only reads: firm dashboards and marketing cost per signed case. Nothing goes back into the case file.
02Writes back: a new lead from your intake rules, or a task or note from a step only your firm runs. Each write uses an endpoint your plan exposes.
03No endpoint yet: the tool prepares the entry and a person reviews and accepts it before it's saved to the case, so nobody retypes it.

How to choose

Rules that settle the choice for a PI firm

Start with a list of the work your staff do outside Filevine or CASEpeer today. Each spreadsheet or shared inbox counts as one entry, and the entries tied to money or deadlines go first.

01Keep Filevine or CASEpeer alone if nothing on that list touches intake or money.
02Build beside it if leads arrive from several sources and need routing rules the intake module can't hold.
03Add a read-only layer if partners rebuild the same report in Excel from three systems each month.
04Use both when the list has a step only your firm runs. Filevine or CASEpeer keeps the record, and your tool does the step and writes back where the API allows.
05Choose neither yet if the list is empty because staff skip the platform. That is an adoption problem to solve first, before any new software is added.

What we have shipped

Lexpair: guided intake and case matching as a working system

We built Lexpair, a legal platform that connects people who need legal help with verified lawyers. Clients submit their case through guided forms. AI-assisted logic sorts each case by practice area and matches it to a lawyer, while admins moderate and track leads from one dashboard. It runs on React and Supabase, with Stripe, Twilio and SendGrid.

Lexpair is a lead-matching platform rather than a PI firm, but your intake gap has the same shape. A lead from any source needs structure, a grade against your rules and the right person, before it becomes a case in Filevine or CASEpeer. Nicolas de Quesada, Lexpair's CEO, put it this way: "Their attention to detail, quality of employees, and work ethic were outstanding."

Questions, answered

What PI firms ask before they build

01Is custom software better than Filevine or CASEpeer for a personal injury law firm?+

Custom software is better only for the steps Filevine or CASEpeer leaves outside the case file. Think of intake routing across offices, or reports that join several systems. For the case lifecycle itself, from treatment tracking to settlement, the platform is the stronger choice. If you build, you'd usually keep the platform and add the missing layer on its API.

02Can I use Filevine and custom software together?+

Yes, and it's the lower-risk route. Filevine stays the case file your staff log into. Your custom tool reads from it for reports and writes back only where Filevine's API exposes an endpoint, with a reviewed queue for the rest.

03How much does custom software cost for a personal injury law firm?+

There's no honest figure before an engineer reads your systems and your API access. You start with a free scoping call. Then comes a Blueprint: a fixed-fee plan an engineer writes from your real systems, covering scope, architecture, risks and a fixed price for each milestone. It also sets out what the tool reads and what it writes back. That fee is credited in full against the build. If the Blueprint doesn't give you a plan you'd act on, you don't pay for it.

04Will I lose my data if I move off Filevine?+

Not if you plan the move. Export every case record, document and note your plan allows, check that histories come out complete, and keep an archive before the contract ends. You may never face this, because the safer route keeps Filevine and builds around it.

05Does CASEpeer have an API?+

Yes, on the Advanced tier, as two separate APIs. Its Data Sync API is read-only and feeds reporting tools like Tableau or Power BI. CASEpeer's Partner API can create and update a limited set of records, and you can email CASEpeer to request more endpoints. Because CASEpeer doesn't give direct support for API implementations, your firm works with its own developer.

06Can custom software write data back to Filevine?+

Where Filevine's v2 API has an endpoint for it. Each call runs as a service account, so what a tool can create or change follows that account's permissions. Filevine's help center describes uploading a document through the API, and says there's no endpoint for running a DocGen. Default credentials carry restricted rate limits, and Filevine has a form to request higher access. In the Blueprint we confirm which write endpoints your account exposes and what rate limit it has.

07Should we replace Filevine or CASEpeer with custom case management software?+

Usually not as a first project. You'd have to copy out case records with their documents and history, rebuild settlement and lien logic, and retrain staff. Both platforms already do that core work. Build the layer around the platform first, and revisit replacement only if the layer keeps growing past the case file.

08Is Filevine or CASEpeer the better fit for a personal injury firm?+

CASEpeer is built only for plaintiff-side personal injury firms, so its PI workflows and reports come ready. Filevine serves several practice areas, from family law to insurance defense, and suits a firm that runs other practice areas beside PI in one system. Pick the one that matches your caseload, then build only what it can't do.

Is custom software better than Filevine or CASEpeer for a personal injury law firm?