Coder · AI that knows your whole codebase

00 What is Coder

AI that understands your whole codebase.

For developers · reads your whole project first · writes straight into your files

If you write software, you've probably used GitHub Copilot or pasted code into ChatGPT. The catch with both: they don't know your project. Copilot sees one file at a time; ChatGPT doesn't know how your pieces connect. So you get generic answers you still have to adapt — or worse, answers that quietly break something else.

Coder reads your entire codebase when you open a project. Ask it something and it already knows how everything fits together, so the answer is specific to your actual code. And it doesn't just suggest — it writes the change directly into the file, with a history you can roll back.

chat · session 012.4k tokens

Build me a REST API in FastAPI with JWT auth. Two routes — POST /signup and GET /me.

DeepSeek V3free · 0.0¢

Here you go. I'll scaffold it with python-jose for JWT and passlib for hashing. Code on the right →

Add rate limiting on /signup.

DeepSeek V3free · 0.0¢

Drafting

main.pyPYTHON

1from fastapi import FastAPI, Depends, HTTPException

2from jose import jwt, JWTError

3from passlib.context import CryptContext

4

5app = FastAPI()

6pwd = CryptContext(schemes=["bcrypt"])

7

8from slowapi import Limiter

9limiter = Limiter(key_func=get_remote_address)

10

11# POST /signup — register a new user

12@limiter.limit("5/minute")

13@app.post("/signup")

14def signup(req: Request, payload: SignupIn):

15 hashed = pwd.hash(payload.password)

16 return {"id": create_user(payload.email, hashed)}

You chat on the left; Coder writes and edits real code on the right — running here on a free model.

Real story — Solo developer

Vikram is building a SaaS product alone in Bengaluru — 80 files and growing every week.

He needed to switch how the app handled background jobs — a change that touched several other parts of the codebase, and he didn't even know how many. With Copilot he'd have traced every file by hand.

He opened Coder, which had already indexed the project, and typed: "I want to switch the job processing system. What else will I need to change?" Coder found the 4 affected files, explained each change, and wrote the updated code. Vikram reviewed and accepted — done in an afternoon instead of a week.

Copilot / ChatGPT

Sees one file, or no project at all
Generic answers you must adapt
You copy-paste code back and forth
A monthly subscription, always

Coder

Reads your entire project
Answers specific to your code
Writes the change into the file — revertable
Free open-source models, forever

Replaces GitHub Copilot Cursor Pasting code into ChatGPT

01 Model selector

You pick the model. You control the cost.

Free open-source for most tasks · premium models only when you actually need them

Most AI tools pick a model for you and bill what they like. Coder gives you a dropdown. Use a free open-source model for the everyday 80% of tasks; reach for a premium model only when a task really needs it. There's even a "free models only" toggle so you never spend by accident.

// pick model · task: refactorFree only

DeepSeek V3FREE∞ tokens · selected

Llama 3.3 · 70BFREE∞ tokens

Mistral Small · 24BFREE∞ tokens

Qwen Coder · 32BFREE∞ tokens

Claude SonnetPAIDat-cost · no markup

GPT-5 miniPAIDat-cost · no markup

Free models run unlimited; premium models are billed at-cost with no markup — your choice, every task.

02 Code review

A senior engineer at every change. For free.

Spots bugs, flags security issues, suggests cleaner code — in plain English

Paste code, drop a file, or point it at a change. Coder reviews it the way a senior engineer would — catches bugs, flags security holes, suggests cleaner alternatives — with inline comments and no condescension. Nothing auto-merges; you stay in charge.

Reviewfeat: user profile API+82 -14 · 3 files

3bugs

2security

5suggestions

42 user = db.query(User).filter(User.id == user_id).first()

42 user = await db.get(User, user_id)

Suggestion: use db.get() for primary-key lookups — it hits the identity map first and avoids the round trip.

43 if user is None:

44 raise HTTPException(404)

45 return {"email": user.email, "hash": user.password_hash}

Security: never expose the password hash, even internally. Strip it from the response.

45 return UserOut.from_orm(user)

Better: use a response model so the schema is enforced.

Bugs, security and style — separated and explained, with the exact fix shown inline.

03 Debug assistant

Read the error. Skip the panic.

Paste a stack trace — get the root cause, the line, and the fix, in plain English

Paste a stack trace and get the real cause in plain English, the exact line to change, the corrected code, and a one-line "why it broke." No more 45-minute Stack Overflow rabbit holes.

TypeError: Cannot read properties of undefined (reading 'name')
at UserCard (UserCard.tsx:14:21)
at App (App.tsx:8:5)

// Root cause

The user prop is undefined on the first render because fetchUser() is async and hasn't resolved yet — so reading user.name fails before the data arrives.

// Fix · UserCard.tsx:14

return <h2>{user.name}</h2>;
return <h2>{user?.name ?? 'Loading…'}</h2>;

// Why this failed

React renders synchronously; the optional chain handles the async gap until the fetch resolves.

The cause, the fix, and the reason — not just "TypeError: cannot read property."

04 Edits + memory

It edits your files — and remembers.

Changes are written straight to disk · revert any time · it remembers the conversation

Coder isn't a copy-paste assistant. When you accept a change, it's written directly into your file. It keeps a history of those edits, so you can simply say revert the last change and it puts the file back. And it remembers the conversation — refer to "that function we just changed" and it knows what you mean.

Writes the change into the fileAccept a suggestion and it lands on disk, in the right place — no manual copy-paste between a chat window and your editor.
Revert with a sentenceEvery applied change is snapshotted. Say "undo the last change" (or hit Revert) and the file is restored — several steps deep.
Remembers the threadIt carries the recent conversation, so follow-ups like "now do the same for the other route" just work.
Lives in the desktop appA full editor, file tree and terminal are built into adris.tech — Coder works right where your project is.

→ Who is this for

If you write code and want AI that actually fits your project — this is it.

Coder is built for developers who care about both quality and cost:

People who benefit most

Solo developers & indie hackers — capable AI help on free models, with full project context.
Small dev teams — reviews, tests and docs without another per-seat subscription.
Students & learners — unlimited free models to build and experiment at zero cost.

Start coding for ₹0.

Free models are free forever. No credit card, no trial timer. Open the desktop app, open a project, ship.

Download — free Browse models Pricing

Code faster. Pay less.