Cy vs Krater

Cy and Krater are both ai agent apps tracked by AIDiveForge. Below is a side-by-side comparison of pricing, capabilities, platforms, and ownership — sourced from each tool's live website and verified before publishing.

Cy

Cy lives inside Slack and connects to your existing tool stack — CRM, inbox, LinkedIn, accounting software, ad accounts — executing multi-step jobs without a handoff back to you. The vendor demonstrates this with accounts receivable chasing, outbound sequence management, influencer pitching, and weekly reporting, all running on a schedule without a trigger from your team. Because there is no canvas to configure and no workflow builder to learn, setup is fast and the barrier to delegation is low. The ceiling appears when you need branching logic, conditional routing, or exceptions handled differently by account type — the page describes plain-English instructions, not configurable decision trees. Teams that need auditable step-by-step control over what Cy does when something goes wrong will find the abstraction uncomfortable.

Krater

The core workflow is a unified chat interface where you route requests to different models — GPT-4, Claude, Gemini, image generators, audio tools — without context-switching between platforms. Slash commands and scheduled tasks let you automate recurring generation jobs inside the same workspace. The ceiling appears when your workflow needs branching: Krater executes single-turn commands well, but it does not plan multi-step tasks or loop through tool use on its own. Teams building anything that requires a model to react to its own previous output and decide a next action will hit that wall quickly. At that point, they move to a purpose-built orchestration layer and use Krater's API access for model calls.

Attribute	Cy	Krater
Pricing	Paid	Paid
Price	$20/mo	$9/mo
Free trial	No	No
Open source	No	No
Has API	No	Yes
Self-hosted option	No	No
Platforms	Slack	Android (with Chrome), iOS (with Safari), Windows (with Chrome or Edge), macOS (with Chrome)
Released	—	2023
Pros	Executes multi-tool jobs end to end inside Slack without switching context, so your team is not the integration layer between CRM updates, email sends, and Notion logs. Scheduled always-on roles mean daily work like invoice chasing or outbound sequencing runs without a daily prompt, so recurring tasks do not slip when your team is heads-down on something else. Plain-English instructions replace workflow configuration, so there is no builder to learn and delegation does not require an ops specialist to set up. Connects to 1,000-plus integrations and syncs results back to the tools already in your stack, which means you are not maintaining a parallel system of record alongside Cy. Learns from each run and logs what worked, so repeated jobs compound rather than starting from scratch each cycle — the vendor's outbound example shows it updating a playbook automatically.	Access to 350+ models under one subscription with no per-provider API key management, so teams stop juggling separate billing accounts when they need to compare output from GPT-4, Claude, and Gemini on the same task. Multi-format generation — text, images, video, audio, code — in one workspace, which means you produce a full marketing asset set without logging into four separate platforms mid-campaign. Scheduled tasks and automation inside the workspace, so recurring content jobs run without manual triggering each cycle. API access included, so developers prototyping across model providers can route calls through a single integration point instead of maintaining separate SDK configurations for each provider. Freemium entry tier lets small teams evaluate real model output before committing budget, avoiding the situation where you discover a tool's output quality only after purchasing an annual plan.
Cons	Plain-English instructions are the only control layer, so when a job hits an exception — a disputed invoice, a prospect who asked to be removed, an escalation that needs a different tone — there is no rule to write and no branch to configure. The task either runs incorrectly or Cy stops and waits. Teams with high exception rates will spend more time correcting outputs than they saved by delegating. There are no approval gates before Cy acts in live systems. If an outbound sequence goes to the wrong segment or an invoice is chased incorrectly, the action has already happened in HubSpot, Amplemarket, or your inbox before you see the thread summary. Teams that need to review before anything ships in a customer-facing context will need a different architecture — one that surfaces a draft and waits for sign-off. No self-hosted option exists, which is a hard stop for organizations under data residency requirements or in regulated industries where customer data cannot leave a specific environment. Teams in those categories move to a self-hostable alternative regardless of how well the workflow fits.	Krater executes single-turn commands — it does not autonomously plan, branch, or chain steps based on previous model output. Any workflow that requires a model to inspect its own result and decide a next action without user input is out of scope; teams handling that use case add a separate agent framework and use Krater only for model call routing. No self-hosted option exists, which means teams with data residency requirements or enterprise security policies that prohibit third-party SaaS handling model inputs cannot deploy Krater in their stack — those teams move to open-source multi-model interfaces they can run on their own infrastructure. The free guest tier caps daily usage at three messages, which is insufficient for evaluating the tool on any realistic content workflow; meaningful quality assessment requires a paid tier, so the freemium entry point functions more as a feature preview than a genuine trial.

Bottom line

Only Krater exposes a public API. Choose based on which difference matters most for your workflow.

Frequently asked questions

What is the difference between Cy and Krater?

Cy is Paid, while Krater is Paid. Compare pricing, free trial, API, platforms, and pros/cons in the table above on AIDiveForge.

Is Cy better than Krater?

It depends on your workflow. Use the side-by-side attributes (pricing, open source, API, self-hosted, platforms) to decide. AIDiveForge does not rank a universal winner — we publish verified facts so you can choose.

Cy vs Krater: which should I pick?

Pick Cy if its pricing model, openness, or platform fit matches your constraints; pick Krater otherwise. Check free-trial availability on each listing if you want to test before committing.

Comparison data is sourced and verified by the AIDiveForge data pipeline. AIDiveForge is editorially independent.