RebuttalBaseThe workspace for building
airtight arguments.
Structure your reasoning, track your sources, visualize argument trees, and find the gaps — all in one place. Whether you're writing a brief, preparing for a debate, or stress-testing a thesis.
No credit card required
Everything you need
A complete toolkit for structured argumentation
Argument Canvas
Visualize your reasoning as an interactive tree. Drag, connect, and reorganize claims, premises, and rebuttals on a spatial canvas.
Source Library
Collect and organize sources across all your projects. Track what supports your stance, what challenges it, and what's neutral.
Research Notes
Rich-text notes linked to specific arguments and sources. Keep your thinking organized alongside your evidence.
Claim Decomposition
Break a complex stance into its underlying structure — core claims, premises, evidence, counter-arguments, and rebuttals.
Research Assistant
Query for evidence and get structured findings with sources. Explore both supporting and opposing perspectives.
Strength Analysis
Identify weaknesses and vulnerabilities in each node of your argument. See confidence scores and get suggestions to improve.
How it works
Define your stance
Start with the argument you want to build or stress-test. Choose a domain — legal, policy, science, ethics, or general.
Build your structure
Decompose your stance into claims and premises, or let the tool suggest a structure. Arrange everything on the visual canvas.
Research and refine
Find sources, link them to specific claims, take notes, and identify where your argument needs more evidence or has vulnerabilities.
Strengthen every node
Analyze individual argument nodes for weaknesses. Add rebuttals to counter-arguments. Build something that holds up under scrutiny.
Built for people who argue for a living
Whether you're in the courtroom, the classroom, or the newsroom.
Lawyers & Legal Teams
Structure case arguments, track precedents, and prepare for opposing counsel's rebuttals.
Policy Analysts
Map the full landscape of a policy debate — stakeholders, evidence, trade-offs.
Debaters & Coaches
Prepare for competitions with structured argument trees and counter-argument practice.
Academics & Researchers
Build thesis arguments with tracked sources and clear logical structure.
Journalists & Writers
Fact-check claims, organize evidence, and build compelling investigative narratives.
Students
Learn critical thinking by building structured arguments and examining opposing views.
Stop arguing from instinct.
Start arguing from structure.
RebuttalBase gives you the workspace to build, test, and strengthen any argument — from a casual debate to a courtroom brief.