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LLM comparison 2026 Rank: #1797

LettiB ✓

One workspace for every AI model.

410 views 6 saves Freemium
Multi-AI Integration AI Integration AI Project Management
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AI Workspace Model Comparison Multi AI Workflow LLM comparison
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Free + from $15/mo

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Verdict

A quick read before you dig into the full page.

Best if
One workspace for every AI model
Skip if
Limited support options
Pick this when
Synthesized information from models

Considering ChatPlayground AI instead? Compare side by side

Overview

LettiB is a multi-AI workspace designed for AI power users. The platform integrates multiple artificial intelligence (AI) models into a single workspace, allowing users to compare outputs from models such as ChatGPT, Claude, Gemini, and Grok simultaneously.

One of its core features is the ability to synthesize the best ideas from these models into a single authoritative answer, which can be saved for future reference.

Additionally, LettiB allows users to organize their work by project, making it easier to manage and search through their data. Essential features also include the ability to add OpenAI, Anthropic, Google, Groq, and xAI keys once for connection, enabling the transaction process to be direct between users and AI service providers.

Moreover, the platform prioritizes privacy with features like encrypted keys and a policy of not training models with user data. Users maintain comprehensive ownership of their data and outputs.

There's also a capability of accumulating important project elements like goals, decisions, preferences, and facts over time, making every new prompt smarter.

LettiB provides a free tier as well as several paid plans to cater to a variety of user needs.

LettiB website

Access & connections

Where you can use LettiB.

Platforms

Web

API

Public API available

Browse other tools with an API

Capabilities

What this tool accepts, produces, and is strongest at.

Input

  • API
  • Tabular
  • Text

Output

  • API
  • Text

Highlights

  • API

Supported features

  • Assistant
  • API

Pros & cons

Pros

  • Synthesized information from models
  • Connects with various providers
  • Organizing with project folders
  • Project memory feature
  • Ownership of data
  • Encrypts API keys
  • Privacy-orientated
  • Bring Your Own Keys
Show 32 more
  • Direct payment to providers
  • No usage markup
  • Ability to save syntheses
  • Offers comparison of outputs
  • Workspace for multiple models
  • Flexible with different providers
  • Allows for direct transactions
  • Accumulative learning over time
  • Free tier offered
  • Variety of paid plans
  • Running multiple prompts
  • Direct links to providers
  • Live response streams
  • Functional comparison mode
  • Generation of single answers
  • Project based organization
  • Searchable project content
  • Growth with project library
  • Automatic memory accumulation
  • Full ownership of creations
  • Secure privacy features
  • Encrypted at rest keys
  • No training on data
  • Options to export/delete
  • Zero markup BYOK
  • Multiple pricing options
  • Unlimited provider choice
  • Upgrade for more models
  • Shareable synthesis links
  • Priority Synthesis Queue
  • Priority support
  • Safe key storage with Supabase

Cons

  • Limited concurrent model comparison
  • No collaborative features
  • Lacks third-party integrations
  • No mobile support
  • Direct API key insertion
  • Free tier limitations
  • Synthesized answers manual process
  • No offline functionality
Show 2 more
  • Absence of workflows automation
  • Limited support options

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Releases 1

Initial release June 16, 2026 Current
Initial release of LettiB.

FAQ 12

What is LettiB?
LettiB is a multi-AI workspace designed for artificial intelligence power users. The platform integrates multiple artificial intelligence models into a single interface, allowing for simultaneous run and comparison of different models' outputs. Users can organize their work by project, making browsing and searching through data easier. Privacy is a priority, with features like encrypted keys and a policy of not training with user data. Users also have full ownership over their data and results.
How does LettiB implement multi-AI integration?
LettiB facilitates multi-AI integration through its design that enables concurrent operation and comparison of outputs from various AI models. Users can add AI keys from leading providers, including OpenAI, Anthropic, Google, Groq, and xAI, and work with all these models at the same time within a single workspace.
What AI models can LettiB work with?
LettiB can work with various AI models, including ChatGPT, Claude, Gemini, and Grok. Users have the flexibility to add AI keys from providers such as OpenAI, Anthropic, Google, Groq, and xAI for facilitating the use of these models simultaneously.
What is the synthesizing ability of LettiB?
Synthesizing ability is a core feature of LettiB. It allows users to run different AI models concurrently, compare their responses, and then synthesize the best aspects of each model's answer into one definitive response. Users can save this synthesized result for future reference.
How does LettiB organize my work?
LettiB provides a project-oriented organization feature. Within the platform, users can create project folders to group chats, compares, and syntheses. This feature ensures that great responses do not disappear in endless threads but instead compound into a knowledge base, making navigation and recovery of past work more straightforward.
Can I connect LettiB with OpenAI?
Yes, LettiB allows users to connect with OpenAI. This is achieved by adding OpenAI keys to the platform, which then makes use of this connection to run and compare model outputs.
Can I link LettiB to Anthropic, Google, Groq, and xAI?
Yes, users can link LettiB to Anthropic, Google, Groq, and xAI. This can be done by adding the respective keys of these AI providers. The integration allows users to run these models concurrently and compare the results in one workspace.
How does LettiB handle user privacy and data?
LettiB prioritizes user privacy and data by implementing several features. It ensures the security of API keys by encrypting them and guarantees it does not train models with user data. Full ownership of user data and results is maintained by the user, and they have the freedom to export, delete, or leave the data at any point.
Is my data encrypted on LettiB?
Yes, data on LettiB is encrypted. Especially, the API keys provided by the users are encrypted and rest assured never shared, amplifying the platform's security measures.
Who retains ownership of data and results on LettiB?
On LettiB, users retain complete ownership of their data and results. It is an essential feature of LettiB's privacy commitment, ensuring that users have the right to export, delete, or leave their data whenever they choose.
What is LettiB's policy on incremental learning?
LettiB adopts an incremental learning policy where every new prompt gets smarter over time. The platform accumulates crucial project elements such as goals, decisions, preferences, and facts automatically, making the workspace adaptive and increasingly more efficient.
Does LettiB offer a free tier?
Yes, LettiB offers a free tier. In the free tier, users can compare up to 2 models at once, are allowed 5 projects, and can perform synthesis 10 times per month. The history of past work is maintained for 7 days.
LettiB Free + from $15/mo
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