Carly AI vs Cassidy: Ready-Made EA vs Team Workflow Builder
Carly is an AI-powered scheduling assistant that works over email and SMS. Unlike traditional booking links or calendar tools, Carly reads messy email threads she is cc'd on, understands context, and sends real invites that keep the conversation natural. You can forward Carly an email, send her a text, or send screenshots and images for her to process and add to your calendar. It's built for busy professionals who want a human-like assistant that just works, handling coordination and calendaring so you don't have to. ChatGPT could never be this useful.
Carly AI and Cassidy both call themselves AI assistants, but they sit in different categories. Carly is a ready-made executive assistant that works over email and SMS out of the box: you CC it on a thread and it schedules, replies, and follows up like a human EA. Cassidy is a no-code platform where teams build their own AI assistants and workflows on top of a shared company knowledge base.
The difference is build vs. use. With Cassidy you configure assistants, connect data sources, and design automations before you get value. With Carly there is nothing to build — you connect your inbox and it starts working in about two minutes. This post lays out where each one fits, honestly.
Feature Comparison
| Feature | Carly | Cassidy |
|---|---|---|
| Works out of the box (no building) | ✅ | ❌ |
| Email-native assistant (reads cc’d threads) | ✅ | Partial |
| SMS / text scheduling | ✅ | ❌ |
| Click-to-book scheduling + follow-ups | ✅ | ❌ |
| Google Calendar + Outlook scheduling | ✅ | Partial |
| Timezone detection | ✅ | ❌ |
| Inbox management, drafting, replies | ✅ | Partial |
| No-code workflow / automation builder | Partial | ✅ |
| Company knowledge base | ❌ | ✅ |
| Custom AI assistants for teams | Partial | ✅ |
| Slack / Teams / Chrome deployment | ❌ | ✅ |
| Meeting recorder | ❌ | ✅ |
| Model-agnostic (OpenAI/Anthropic/Google) | ❌ | ✅ |
| Integrations | 200+ (bring-your-own-API-key) | Hundreds |
| Acts automatically on triggers | ✅ | ✅ |
| Setup time | ~2 min | Configure per assistant/workflow |
| Pricing | Starts at $35/mo | Free Starter (3 seats); Business/Enterprise custom |
Cassidy’s pricing centers on a credit model: the free Starter tier includes 3 seats, one workspace, 10,000 AI credits per month, and 30,000 knowledge-base pages with basic integrations, while the Business and Enterprise tiers unlock all features and higher limits at custom pricing you get by contacting sales. Credits are consumed as tasks run — simple tasks cost fewer, complex workflows cost more.
Carly is Ready the Moment You Connect Your Inbox
Carly is an assistant, not a platform. Cassidy is genuinely powerful, but it hands you a toolkit: you define assistants, wire up a knowledge base, and design workflows before anything runs. That is the right model when a team wants bespoke automations. It is the wrong model when one person just needs their scheduling and inbox handled. Carly ships as a finished executive assistant — CC it on an email and it books the meeting.
Carly owns email and SMS the way a human EA does. It reads cc’d threads, proposes times, sends click-to-book links, detects timezones, coordinates across Google Calendar and Outlook, and chases replies with follow-ups — over both email and text. Cassidy deploys inside Slack, Teams, Chrome, and Office apps and can draft, but it is not built to live in your inbox and run a back-and-forth scheduling negotiation over SMS with an outside guest.
Setup is minutes, not a build project. Carly takes about two minutes to connect and responds in roughly a minute, 24/7. Cassidy’s value scales with how much you configure — knowledge sources, assistant instructions, workflow logic. For a team investing in custom automation that effort pays off; for an individual who wants scheduling off their plate today, it is overhead.
Pricing is one number. Carly starts at $35/month, flat and predictable. Cassidy’s free Starter is a real on-ramp for small teams, but serious use runs on metered credits and moves you to Business or Enterprise tiers with custom, sales-negotiated pricing. If you want to know your bill in advance without watching a credit meter, Carly is simpler. For a wider view of this category, see the best AI executive assistants and the best AI workflow automation tools.
Who Should Pick Which
Pick Cassidy if you are a team that wants to build custom AI assistants and automations grounded in your company’s knowledge base — support reply drafting, RFP responses, lead qualification — and you have someone to configure and maintain them. Pick Carly if you are an executive, founder, or busy professional who wants scheduling, inbox triage, and follow-ups handled over email and SMS with no building and a flat $35/month. If Cassidy feels like more platform than you need, see other Cassidy AI alternatives.
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See what people say
"Before Carly, I relied on a Calendly link, but the whole process felt impersonal and not very professional. Carly changed that by handling all the back-and-forth, so I'm no longer stuck in endless email threads trying to line up schedules.
Now Carly reaches out to candidates, shares my real-time availability, lets them pick a slot, then sends a Zoom link and drops it straight into my calendar. She sends reminders to both of us before each call, which has significantly reduced no-shows and last-minute confusion.
On top of scheduling, Carly acts like a full executive assistant, sending me my schedule the night before so I can prepare for each call. It reminds me of the old x.ai assistant, but Carly is noticeably smarter, faster, and better suited to my healthcare recruitment business."
