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Aiogram vs python-telegram-bot: Which One to Use?

If you're building a Telegram bot in Python, you'll hit this question immediately: Aiogram or python-telegram-bot? Both are mature, well-documented, and actively maintained. But they're built on different philosophies — and choosing the wrong one early costs you a rewrite later.

I've shipped production bots with both. Here's the honest breakdown.

# The Core Difference

python-telegram-bot started as a synchronous library and added async support later. Aiogram was built async-first from day one, using Python's asyncio natively.

This matters because Telegram bots are inherently I/O-bound — waiting for API responses, database queries, external APIs. Async handles this without threads.

# Code Comparison

python-telegram-bot

from telegram.ext import ApplicationBuilder, CommandHandler

async def start(update, context):
    await update.message.reply_text("Hello!")

app = ApplicationBuilder().token("TOKEN").build()
app.add_handler(CommandHandler("start", start))
app.run_polling()

Aiogram

from aiogram import Bot, Dispatcher, Router
from aiogram.filters import Command
from aiogram.types import Message

router = Router()

@router.message(Command("start"))
async def start(msg: Message):
    await msg.answer("Hello!")

dp = Dispatcher()
dp.include_router(router)

async def main():
    bot = Bot("TOKEN")
    await dp.start_polling(bot)

import asyncio
asyncio.run(main())

Aiogram uses decorators and routers — cleaner separation of concerns for larger bots. python-telegram-bot uses handler registration which feels familiar if you come from older frameworks.

# Feature Comparison

Feature	Aiogram 3.x	python-telegram-bot 21.x
Async-first	✓ Yes	✓ Yes (v20+)
FSM (state machine)	✓ Built-in	✗ Manual
Middleware	✓ Built-in	Limited
Filters system	✓ Composable	Basic
Webhook support	✓ Easy	✓ Easy
Learning curve	Medium	Low
Community size	Large	Very large

# When to Use Which

Use Aiogram if:

• Your bot has conversation flows with multiple states
• You need middleware (logging, auth, rate limiting)
• You're building something that will grow
• You want clean, scalable architecture from the start

Use python-telegram-bot if:

• You're a beginner — the docs are excellent
• You need a simple bot fast with minimal boilerplate
• You're already familiar with it