Poker Bot vs Solver: What Is the Difference?

People often use “bot” and “solver” as if they were the same thing. They are not, and the difference explains a lot about what bots can and cannot do.

What a solver is

A solver (PioSolver, GTO+, Simple Postflop, the engines behind GTO Wizard) takes a defined spot – ranges, stacks, board, allowed bet sizes – and computes a strategy for both players that neither can profitably deviate from. It is a study tool. Solving one flop with a few bet sizes takes seconds to minutes; solving the whole game is impossible, so solvers work on abstractions. Using a solver away from the table is permitted everywhere.

What a bot is

A bot plays. It has to decide in a second or two, on any board, against any action, without a human. It cannot run a full solve per decision, so it plays from precomputed tables, simplified strategies and fast approximations. A bot’s strategy is at best a compressed shadow of what the solver would say. See how poker bots work.

How they relate

• Modern bots are built from solver output: run many solves offline, store the results, and look them up or approximate between them at the table.
• The compression loses accuracy. Where the bot’s tables do not cover the exact spot, it abstracts bet sizes and board textures, and quality depends on how that abstraction is done.
• A solver is legal to use; a bot violates almost every site’s terms. The same strategy is treated completely differently depending on whether a human or a program clicks.

Which one you need

If you want to get better at poker, you need a solver or a trainer built on one, and you do not need a bot. If you want software to play for you, you are asking about a bot, with everything that comes with it – see legality and detection. The solvers themselves are reviewed in the reviews section.