Law firm software: how to choose and what it costs in 2026

By Igor Costa · October 26, 2026 · 7 min read

To choose law firm software, compare four things. How many OAB numbers does capture cover? How many users and cases does the plan allow? Does the finance module issue charges and invoices? How does the data get out? In 2026, published plans run from R$ 79 to R$ 3,790 per month. The DJEN remains the official source for deadlines.

What does law firm software need to have?

It needs to cover the path from case to fees: the publication, the deadline, the schedule, the client and finance. And it needs to let the data out whenever the firm wants.

The table works as a script for the conversation with any vendor:

The first row gained weight in 2025. See how to count deadlines from the DJEN. The finance row has Code of Ethics rules: see what the OAB allows when collecting fees.

How much does law firm software cost in 2026?

Published plans run from R$ 79 to R$ 3,790 per month, not counting setup fees and extra modules. The prices below were taken from the official pages on October 26, 2026.

Four notes on the table:

• ADVBOX charges an activation fee, with no amount on the page. The page's calculator differs from the table on included cases and on the Elite price (R$ 1,750 or R$ 1,800).
• EasyJur charges a setup fee and sells modules separately. The API and the MCP server cost R$ 70 to R$ 799 per month. WhatsApp Talk costs R$ 499 to R$ 1,990, plus R$ 880 for setup.
• The full Projuris ADV, for larger firms, is priced on request.
• "Name", "term" and "lawyer with notices" do not mean the same thing at each vendor. Ask how many of your firm's OAB numbers the capture covers.

How do you compare price by firm size?

Compare on the limit your firm will hit first: users, OAB numbers in capture or monitored cases. That is what pushes you to the next plan up.

An example: a firm with 5 people, 4 lawyers and 400 active cases.

The math shows that the entry price is misleading. A firm with several OAB numbers can pay double the entry plan just for capture.

Before deciding, ask the vendor for a written proposal with your number of lawyers, users and cases. A fair comparison uses the same three quantities.

Where do the data and confidentiality sit?

The firm's data sits on the vendor's server, but the responsibility stays with the firm. The contract needs to say how the data gets out and who accesses what.

Three rules weigh on the choice:

• LGPD. The firm is the controller, which decides on processing. The vendor is the processor and handles data according to the firm's instructions (Law 13.709/2018, art. 39). Art. 46 requires security measures on both sides.
• Statute of the Legal Profession. Art. 7º, II, protects the inviolability of the office, the work tools and the lawyer's electronic correspondence.
• Code of Ethics. Professional secrecy is a matter of public order and does not depend on the client asking (art. 36).

In practice, ask the vendor for:

1. full export in an open format, with a delivery deadline;
2. access by team or by case, not one login for everyone;
3. a log of who accessed each case;
4. the deadline for deleting the data after the contract ends.

How do you switch law firm software without missing a deadline?

Export before signing with the new vendor, migrate what falls due first and check the DJEN throughout the transition. Deadlines do not wait for the migration.

The steps:

1. Inventory. List active cases, open deadlines, scheduled hearings, fee contracts and documents.
2. Test export. Ask the current vendor for the export and check a sample of ten cases.
3. Deadlines and hearings first. Enter in the new system everything due in the next four weeks, with an owner.
4. Daily DJEN check. During the transition, check the DJEN by each lawyer's OAB number. The new system's capture has no history yet.
5. Parallel period. The old system stays read-only for a few weeks.
6. Fees. Migrate contracts with future installments before the next due date.

Avoid switching near the court recess from December 20 to January 20. The team is usually smaller, and the suspended deadlines all start running again on January 21.

Switch the software or add a layer on top?

It depends on what fails. Sometimes the software handles deadlines and cases well, but the client, the fees and the partner are left out. In that case, a layer on top solves it without migration.

Three signs that a full switch makes sense:

• capture fails and nobody checks the source;
• finance lives in a spreadsheet next to the system;
• the partner only finds out what stalled when someone asks.

Three signs that the layer is enough:

• the team knows the software and uses it every day;
• the vendor has an API, and the data gets out when the firm wants;
• the problem sits between the deadline, the client and finance, not inside the case.

How CERNE solves it

CERNE becomes the firm's system or works on top of the software already in place.

• No system. Cases, DJEN notices, deadlines, schedule, clients, fees with invoicing and finance in one place.
• With ADVBOX, Projuris or EasyJur. CERNE integrates via API and handles checked deadlines, the client and the partner on top. With another system, notices come straight from the DJEN.
• DJEN check. What the DJEN published and the firm's system didn't show becomes a card with an owner.
• Confidentiality per case. Each lawyer sees their team's cases, and each access is logged.
• Updates to the client. The case progress summary, approved by the lawyer, reaches the client on WhatsApp.

The legal package uses modules already running at CERNE clients: the board with owner and deadline, and approval before anything is sent. See the modules on the law firms page and the path from solo lawyer to large firm.

Start with the assessment

The prices in this text change, and your firm's math depends on your OAB numbers and your cases. Start with an assessment of your operation: our team compares what you have with what you need, before any switch. Book the assessment.

Frequently asked questions

What is the best law firm software for a small firm?

The one that covers deadlines, capture of publications for every OAB number at the firm, and finance, within your number of users. Compare on the limit of names in capture and monitored cases, which change the price more than the feature list.

How much does law firm software cost in 2026?

On the pages accessed October 26, 2026, entry plans run from R$ 79 (Projuris ADV Start Solo) to R$ 229 (EasyJur Start) per month. On plans capped at 10 users, R$ 689 (Astrea Company, annual) and R$ 990 (EasyJur Standard). ADVBOX does not cap users and changes plan by capture and cases.

Does law firm software capture DJEN notices?

The software captures publications by name or OAB number, with a limit per plan. The capture is a copy of the gazette. The official source is the DJEN, which the CNJ offers free at comunica.pje.jus.br, with search by OAB number.

Who owns the firm's data in law firm software?

Under the LGPD, the firm is the controller and decides on data processing. The vendor is the processor and handles data according to the firm's instructions (art. 39). Require full export and a return deadline in the contract.

How do you switch law firm software without missing a deadline?

Export everything before signing with the new vendor and migrate open deadlines and hearings first. During the transition, check the DJEN by each lawyer's OAB number. Only cancel the old system after checking a sample of cases.

Sources

1. Aurum, Astrea, plans and pricing, accessed October 26, 2026
2. ADVBOX, plans, accessed October 26, 2026
3. Projuris, ADV Start, accessed October 26, 2026
4. EasyJur, plans and pricing, accessed October 26, 2026
5. CNJ, Comunicações Processuais (DJEN)
6. Lei Geral de Proteção de Dados, Law 13.709/2018
7. Estatuto da Advocacia, Law 8.906/1994
8. OAB, Código de Ética e Disciplina, Resolution 02/2015