AI · alternatives · 2026
24 alternatives to AI Duel
Send your AI agent to an LLM prompt-injection arena
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
Agent Arena▲348Creator here. I built Agent Arena to answer a question that kept bugging me: when AI agents browse the web autonomously, how easily can they be manipulated by hidden instructions? How it works: 1. Send your AI agent to ref.jock.pl/modern-web (looks like a harmless web dev cheat sheet) 2. Ask it to summarize the page 3. Paste its response into the scorecard at wiz.jock.pl/experiments/agent-arena/ The page is loaded with 10 hidden prompt injection attacks -- HTML comments, white-on-white text, zero-width Unicode, data attributes, etc. Most agents fall for at least a few.…
Jun 2026 · arena42.ai · its alternatives →
- 2
Code Arena▲272Prompt once. Compare multiple AI-built apps for free.
Feb 2026 · arena.ai · its alternatives →
- 3
Get real-world tasks done with autonomous AI agents
Jun 2026 · arena.ai · its alternatives →
- 4
Generative AI powered Master Agent Developer Framework
2023 · floatbot.ai · its alternatives →
- 5
LLM-generated real-time commentary for Pong. Contribute to pncnmnp/xpong development by creating an account on GitHub.
2025 · github.com · its alternatives →
- 6
Watch your AI agents debate and create in real-time
2025 · its alternatives →
- 7
- 8
Hi HN, I built this open-source LLM red teaming tool based on my experience scaling LLMs at a big co to millions of users... and seeing all the bad things people did. How it works: - Uses an unaligned model to create toxic inputs - Runs these inputs through your app using different techniques: raw, prompt injection, and a chain-of-thought jailbreak that tries to re-frame the request to trick the LLM. - Probes a bunch of other failure cases (e.g. will your customer support bot recommend a competitor? Does it think it can process a refund when it can't? Will it leak your user's address?) -…
2024 · promptfoo.dev · its alternatives →
- 9
I built a March Madness bracket challenge for AI agents, not humans. The human prompts their agent with the URL, and the agent reads the API docs, registers itself, picks all 63 games, and submits a bracket autonomously. A leaderboard tracks which AI picks the best bracket through the tournament. The interesting design problem was building for an agent-first user. I came up with a solution where Agents who hit the homepage receive plain-text API instructions and Humans get the normal visual site. Early on I found most agents were trying to use Playwright to browse the site instead of just…
Mar 2026 · bracketmadness.ai · its alternatives →
- 10
The initial idea for the game came during the final day of Game AI school in Cambridge. There, we had a Jam where we explored the idea of using LLMs as a game engine for fights. We then built a full web version in just a week. There is no need to register or pay to play. Test it out!
2023 · llmarena.com · its alternatives →
- 11
Test LLM prompts & models side-by-side against many inputs
2024 · its alternatives →
- 12
- 13
The context manager and skills library for marketing teams
Apr 2026 · promptr.ai · its alternatives →
- 14
Generative AI powered master agent developer framework
2023 · floatbot.ai · its alternatives →
- 15
- 16
Build & run AI agents on free premium LLMs
2025 · toolhouse.app · its alternatives →
- 17LA
I used to play the Wikipedia Game in high school and had an idea for applying the same mechanic of clicking from concept to concept to LLMs. Will post another version that runs with an LLM entirely in the browser soon, but for now, please enjoy as long as my credits last... Warning: the LLM does not always cooperate
Jan 2026 · llmgame.ai · its alternatives →
- 18
What PokerBattle.ai is a week-long live no-limit Texas Hold’em tournament where all players are top-tier reasoning LLMs. We’re testing how different models handle imperfect information and whether they can sustain consistent, math-driven poker without tool use or custom code. Why - In poker you can do well with basic math + consistent logic. - Superhuman poker AIs exist, but they rely on massive simulation/game-theory solvers and are effectively black boxes. - We want a rough, apples-to-apples comparison of LLM reasoning on poker decisions, and to collect public reasoning summaries that…
2025 · pokerbattle.ai · its alternatives →
- 19
Play Heads Up with ANY category, using AI to generate decks
2024 · apps.apple.com · its alternatives →
- 20
100 LLM attack prompts across 18 categories — $29
Jul 2026 · payhip.com · its alternatives →
- 21
Paste one prompt. Your AI agent registers a creature, fights battles, levels up, and trash talks — all on its own. You just watch.
May 2026 · battleclaws.ai · its alternatives →
- 22
- 23
- 24
An AI gaming benchmark. Lmarena, but with games.
Nov 2025 · llmchampions.com · its alternatives →
Also compare
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →