One workspace for every AI model.

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June 16, 2026

LettiB

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Multi-AI Integration AI Integration AI Project Management AI Workspace Model Comparison Multi AI WorkflowFree + from $15/mo

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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.

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June 16, 2026

Initial release of LettiB.

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Richard Brazzle

@richard-brazzle

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Joined: June 2026

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Pros and 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

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

View 35 more pros

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

Absence of workflows automation

Limited support options

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Q&A

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.

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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.

What are the paid plans offered by LettiB?

LettiB offers a range of paid plans, which include the Pro Monthly plan for $15/month, Power Monthly for $35/month, and the Lifetime BYOK plan available for a one-time payment of $79. Each plan offers increasing levels of functionalities, such as the use of more models at once, unlimited projects, unlimited synthesis, unlimited history, and additional features. All the paid plans operate on a BYOK (Bring Your Own Keys) model.

How does LettiB compare and contrast AI model outputs?

LettiB offers a Compare Mode where users can run the same prompt across different AI models like ChatGPT, Claude, Gemini, and Grok simultaneously. The responses are visualized side by side, enabling users to grade, follow up, and iterate in a unified workspace, hence facilitating a straightforward comparison and contrast of AI model outputs.

Can LettiB save my synthesized answers for future reference?

Yes, LettiB empowers users to save synthesized answers for future reference. Synthesis merges the strongest ideas from various model output into one definitive answer, which can be stored perpetually in your project folder.

How direct is the transaction process to AI service providers?

The transaction process to AI service providers is facilitated by the 'Bring Your Own Keys' (BYOK) model. Users can connect their AI keys from the respective providers. As a result, users can pay these providers directly, establishing a direct transaction process without any usage markup on LettiB's part.

What are the privacy features of LettiB?

LettiB's privacy features include a commitment to not train any AI models on user data. The API keys provided by the user are encrypted and never shared, ensuring secure connectivity with AI providers. The platform also guarantees complete ownership of data and results to its users, who can choose to export, delete, or leave their data at any time.

How does LettiB accumulate important project elements over time?

LettiB accumulates important project elements over time, thus improving with every new prompt. Features such as goals, decisions, preferences, and facts related to a project are automatically accumulated in what's referred to as 'Project Memory.' This process makes every new prompt smarter, allowing the user's workspace to evolve and adapt over time.

Can I bring my own keys (BYOK) to LettiB?

Yes, LettiB supports a 'Bring Your Own Keys' (BYOK) model. This model allows users to connect their API keys from preferred AI providers, thus enabling them to pay these providers directly, ensuring transparency and eliminating any usage markup.

What is the 'Compare Mode' and 'Synthesis' feature in LettiB?

'Compare Mode' and 'Synthesis' are two critical features of LettiB. 'Compare Mode' allows users to run the same prompt across different AI models like ChatGPT, Claude, Gemini, and Grok concurrently. They can then compare each response side by side. 'Synthesis' comes into play after the comparison step; it merges the best parts of each model's response into one final, polished answer. This synthesized answer is attributed to its source models and can be saved to the user's project permanently.

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