Ditch Trello: Build a $20/Month AI Kanban

TL;DR

Trello’s paid plans run $10 to $17.50 per user per month (pricing verified as of May 2026), which adds up fast on even a 5-person team. You can build a fully functional Kanban board with an AI assistant using Supabase, Lovable, and the Claude API for under $20/month total. The build takes a weekend and pays for itself inside 2 months.

What Trello Actually Costs a Small Team

Trello’s free plan sounds fine until you hit it. Ten boards per workspace. Ten Power-Ups. Automation runs capped at 10 per month. For a 5-person service business running client projects, that ceiling shows up in the first week.

Free Plan Limits in Practice

The free tier was designed for individual use or very light team coordination. The moment you add a second client project or a recurring weekly automation, you start burning through those 10 automation runs before the month is halfway done. Power-Up limits mean you pick between a calendar view and a time-tracking integration, not both.

Paid Plan Pricing (as of May 2026)

The Standard plan is $10/user/month billed annually, or $12.50 billed monthly. The Premium plan, which adds timeline views, AI features, and unlimited automations, runs $17.50/user/month billed annually. These figures come directly from Trello’s pricing page (see references) and should be verified against current Trello pricing before budget decisions.

For a 6-person team on Premium: $1,260/year. For a 10-person team: $2,100/year. And what you are mostly buying is a visual task list with some automation bolted on.

What You Do Not Get on Any Trello Plan

Trello’s AI features, even on Premium, are narrow: the assistant helps you write card descriptions. You cannot prompt it to summarize an entire project, flag blockers across all cards, or generate a stakeholder update from board state. You also cannot add custom logic beyond what Butler automation supports, and you cannot integrate deeply with tools outside Atlassian’s ecosystem without paying for third-party connectors.

What a Custom Build Actually Gets You

The pitch here is not “build something worse for less money.” It is: build something tailored to exactly how your team works, with an AI layer that Trello charges extra for, and run it for $5 to $20/month in API and hosting costs.

Core Features You Can Build in a Weekend

A custom Kanban built on Supabase, Lovable, and the Claude API gives you drag-and-drop columns, card creation and assignment, due dates, file attachments via Supabase Storage, and an AI assistant that can summarize cards, write status updates, flag overdue work, or answer questions like “what is blocking the Henderson project?” in plain English.

The AI Layer You Actually Own

Trello’s AI features are locked to card description writing. Your custom assistant can do anything you prompt it to do, because you own the system prompt entirely. You can instruct it to act as a project manager for a marketing agency, a delivery coordinator for a logistics company, or a client-communication assistant for a law firm. The prompt is yours. The behavior follows.

Custom Logic Trello Cannot Touch

Beyond AI, a custom build lets you wire logic that Trello’s Butler automation cannot replicate. Auto-create cards from form submissions. Sync card status with your CRM. Trigger an invoice in your billing tool when a card moves to “Done.” Send a Slack message with a full project summary every Friday at 9 a.m. These are standard webhook and API patterns that take an afternoon to implement once your board is live.

The Stack: Three Tools, One Weekend

This section covers each tool in the recommended stack, what it costs, and why it fits the build.

Supabase: Database, Auth, and Storage

Supabase handles your database, authentication, and file storage. The free tier gives you 500MB of database space and 1GB of file storage, which covers most SMBs comfortably. If you grow past it, the $25/month Pro plan handles up to 8GB. Supabase uses PostgreSQL under the hood, which means your data model is relational, queryable with standard SQL, and easy to extend. Row-level security is a first-class feature, not an add-on.

Lovable: Prompt-to-App Frontend Builder

Lovable is a prompt-to-app builder that generates a full React frontend from your description. You describe the Kanban UI you want, it generates the component structure, connects it to Supabase, and you iterate from there. Lovable’s free tier gives you 5 projects. The $25/month Starter plan is worth it if you are building multiple tools, which you probably will be once this first one ships.

Claude API: The AI Assistant Layer

The Claude API from Anthropic is the AI layer. You bolt it onto your board as a chat panel or a per-card assistant button. For a 10-person team making light use of it, 50,000 to 100,000 tokens per month runs roughly $5 to $15 at May 2026 Anthropic pricing (see Anthropic Claude API Documentation in references for current rates).

Total Monthly Cost

The total monthly cost for a real 10-person team runs $0 to $50 depending on Lovable plan and Claude API usage. Even at $50/month, you are saving $1,550/year versus Trello Premium for the same team size.

Comparing the Real Options

The table below compares Trello’s current plans against a custom build for a 10-person team. All Trello pricing reflects May 2026 figures from the Trello pricing page (see references).

Option	Monthly Cost (10 users)	AI Features	Custom Logic	Build Time
Trello Free	$0	None	Very limited	None
Trello Standard	$100 to $125	None	Basic automation	None
Trello Premium	$175	Card writing only	Moderate	None
Custom (Supabase + Lovable + Claude)	$15 to $50	Fully customizable	Unlimited	8 to 16 hours

The custom build costs more in time upfront. It costs significantly less every month after, and the capability gap grows in your favor as your prompts and logic mature.

How to Actually Build It

This section walks through the full build sequence from initial prompt to live deployment.

Step 1: Generate the Board in Lovable

Start in Lovable. Describe your board in plain language: “I want a Kanban board with columns for Backlog, In Progress, Review, and Done. Cards have a title, description, assignee, and due date. Users can drag cards between columns.”

Lovable generates the React app from that description. You will iterate two or three times to get the layout and card detail view right, but the scaffolding comes out clean.

Step 2: Connect to Supabase

Connect the Lovable-generated app to your Supabase project using Lovable’s native Supabase integration. Your data model stays simple: a boards table, a columns table, and a cards table with a column_id foreign key and an order integer for drag-and-drop positioning. Add a users table that mirrors Supabase Auth so you can reference assignees by user ID.

Step 3: Add the AI Assistant

Create a /api/assistant endpoint, a Vercel Edge Function works well here, that accepts a card ID or board context as input. The function pulls the relevant data from Supabase, then sends it to the Claude API with a system prompt you control. A starting prompt might read: “You are a project assistant for a 10-person marketing agency. When asked about a card or project, summarize status, flag blockers, and suggest next actions in three bullet points or fewer.”

Surface the assistant as a floating chat panel on the board or as a button on each card that opens a summary drawer. Either pattern takes about 3 hours to wire up.

Step 4: Deploy to Vercel

Deploy to Vercel using the free tier, which handles any SMB-scale internal tool without issue. Set up Supabase auth so your team logs in with work email addresses. Share the URL. You are live.

The Permissions Problem (It Is Not Actually a Problem)

The concern people raise most often about custom builds is user permissions. Can junior staff see client budgets? Can contractors see everything?

Configuring Row-Level Security in Supabase

Supabase’s row-level security (RLS) handles this cleanly. A policy written as “users can only read cards where their user ID matches the assignee_id or they hold an admin role” enforces that rule at the database layer, not the application layer. That means even a direct API call cannot bypass it.

Two Roles Cover Most SMBs

For most small and mid-size businesses, two roles work fine: admin (sees everything, can create boards) and member (sees assigned boards and cards). You can add contractor and client roles later if the project grows. The initial RLS setup takes roughly 2 hours. Once it is in place, it requires no ongoing maintenance unless your permission model changes.

When to Stay on Trello

Not every team should rebuild their project management tooling from scratch. There are clear cases where staying on Trello makes sense.

If your team is under 3 people and you are on the free plan, the math does not work yet. The cost savings are too small to justify a weekend build.

If your workflow is genuinely simple and you are not hitting Trello’s limits, a custom build is overhead you do not need. This guide is designed to replace something you are paying for and outgrowing, not to rebuild tools that are working.

The case for a custom build becomes strong when you are paying $100 or more per month for Trello, when you want AI features that Trello locks behind its highest tier, or when you need logic that Trello’s automation cannot touch: auto-creating cards from form submissions, syncing with your CRM, or triggering downstream actions when a card reaches a specific column.

Extending the Board After Launch

Once your base board is live, the extension surface is wide. Most teams add two or three of these within the first month.

Recurring Card Templates

A simple cron job in Supabase Edge Functions can auto-create a card set every Monday morning based on a template row. Weekly team standup prep, client reporting cycles, and recurring delivery checklists all benefit from this pattern. It takes about 90 minutes to implement.

Slack or Email Digests

A Friday afternoon summary of all cards in “In Progress” or “Review” sent to a Slack channel or team email takes one Vercel cron function and one Claude API call. The prompt instructs the assistant to pull all active cards, group them by assignee, and write a plain-English summary. Teams that use this pattern consistently report fewer missed handoffs.

CRM Sync

If your team uses a CRM that has a REST API (most do), you can write a Supabase database trigger that fires whenever a card moves to “Done” and pushes a status update to the corresponding deal or contact record. This closes the gap between project delivery and sales tracking without any manual data entry.

The Bottom Line

A 10-person team paying Trello $175/month for the Premium plan can replace it with a custom Kanban and a Claude-powered AI assistant for $15 to $50/month ongoing, based on May 2026 pricing from Trello, Supabase, and Anthropic (see all references). The build takes a weekend. The savings start in month two. You end up owning a tool that does exactly what your business needs instead of what Trello’s product roadmap decided to ship.

The AI layer you build is not a limited card-writing helper. It is a configurable assistant that knows your board, your team, and your projects, because you wrote the system prompt and you control the data it sees.

For teams that have already hit Trello’s limits and are writing a check every month for features they half-use, the custom build math is straightforward.

Need Help Building This?

Kreante helps SMB owners replace expensive SaaS subscriptions with custom AI tools. With 265+ projects shipped (60% LowCode/AI, 70% B2B) for clients across the US, Europe, and LATAM, the team has worked through every edge case in this stack.

To book a 30-minute consultation, visit the Kreante contact page at kreante.co.