Self-improving
Opening experiments run for you.
Darwinvs
More meetings. Less managing.
SendPulse is a marketing suite where chatbots and website live chat sit next to email, with AI models you can plug in. Darwin is a single-purpose website chat that books meetings and keeps improving its openings. Here's how they compare.
AI chat that learns how to book more meetings.THE DARWIN FILM
AI-assisted setup
Your website becomes your starting point.
Start for free
Try Darwin with included bookings.
THE SIDE-BY-SIDEThe difference,
The difference,
at a glance.
For a small business that wants bots on WhatsApp, Instagram, Telegram and its website under one bill priced by subscriber count, SendPulse covers a lot of ground. Darwin is for a team with a narrower need: the chat on the website has to turn into meetings, and nobody has time to build flows. The rows below show how they differ on automation, setup and price.
01
Self-improvement
How each product improves the openings that start sales conversations.
| What matters | Darwin | |
|---|---|---|
| Self-improves to book more meetingsi | Yes | Not documented |
| Writes new openings for each pagei | Yes | Manual setup |
| Tests and keeps better openingsi | Yes | Not documented |
| Starts the next test automaticallyi | Yes | Not documented |
Sources & important details
Self-improves to book more meetings
Darwin
Creates tests. Promotes qualifying winners. Tests again. 1
With automation enabled, on eligible pages within your plan. Tests need enough traffic; a lift is not guaranteed.
Checked Sep 11, 2026Writes new openings for each page
Darwin
Creates opening variants from page context. 1
For pages with automation enabled and sufficient traffic to run an experiment. Every plan includes unlimited optimized pages.
Checked Sep 11, 2026SendPulse
Opening messages are written by the operator and targeted by rules. 2
Targeting decides where a message shows; the copy is authored manually.
Checked Sep 11, 2026Tests and keeps better openings
Starts the next test automatically
Darwin
The next opening experiment builds from the current winner. 1
Automation must be enabled and the page eligible. This does not guarantee improving results.
Checked Sep 11, 2026SendPulse
An automatic cycle of generating, testing and replacing openings is not documented. 2
Changes are made and published by the operator.
Checked Sep 11, 202602
Onboarding
What the product prepares for you before you go live.
| What matters | Darwin | |
|---|---|---|
| Learns from your websitei | Yes | Prompt + files |
| Drafts your sales settingsi | Yes | Not documented |
| Matches chat to your brandi | Colors & fonts | Not documented |
| Writes your first chat openingi | Yes | Manual setup |
| Review before going livei | Yes | Not documented |
Sources & important details
Learns from your website
Darwin
Discovers relevant website pages and prepares the knowledge base. 4
Initial setup selects key pages for speed; more pages can be imported later.
Checked Sep 11, 2026SendPulse
AI answers from your instructions and files; website crawling is not described. 3
Web search can be enabled as an option.
Checked Sep 11, 2026Drafts your sales settings
Darwin
Prepares business information and assistant settings from the website. 4
The user can review and refine the generated draft.
Checked Sep 11, 2026SendPulse
Automatic drafting of business settings from the website is not documented. 3
Prompts and flows are written by the operator.
Checked Sep 11, 2026Matches chat to your brand
Darwin
Extracts brand colors, fonts and assets for the chat design. 4
Brand detection is a draft: available fonts, contrast and source-site access affect the result.
Checked Sep 11, 2026SendPulse
Colors are chosen manually; automatic brand import is not documented. 5
A color scheme is selected in widget settings.
Checked Sep 11, 2026Writes your first chat opening
Darwin
Drafts the first chat opening from the business context. 4
Uses the same opening requirements as the experiment writer; the draft remains editable.
Checked Sep 11, 2026SendPulse
A default Welcome message flow is provided and edited by the operator. 5
Flows are edited in the builder.
Checked Sep 11, 2026Review before going live
Darwin
The assistant draft can be reviewed and refined before installation. 4
Calendar connection, testing and website installation remain separate completion steps.
Checked Sep 11, 202603
Pricing
USD before tax. Darwin charges per booked meeting. SendPulse has a free tier and prices Pro by subscriber count.
| What matters | Darwin | |
|---|---|---|
| Lowest monthly platform feei | 0 USD / month | 0 USD / month |
| Introductory offeri | 5 free bookings | Free plan |
| AI usage chargei | 20 USD / booking | Paid plan required |
| Paid plans start ati | 99 USD / month | By subscribers |
| Included on paid plansi | 5–60 bookings / month | Unlimited on Pro |
| Additional paid-plan usagei | $5–$15 / booking | Paid plan required |
Sources & important details
Lowest monthly platform fee
Introductory offer
AI usage charge
Paid plans start at
Darwin
99 USD / month 6
Base subscription only. Annual billing discounts the base by 20%; usage rates remain unchanged.
Checked Sep 11, 2026SendPulse
Pro is priced by subscriber count; the calculator showed $42.25 per month for 120,000 subscribers on annual billing. 7
Smaller subscriber tiers are available in the calculator.
Checked Sep 11, 2026Included on paid plans
Additional paid-plan usage
Darwin
Extra bookings cost $15 on Adapt, $10 on Evolve and $5 on Apex. 6
In addition to the subscription, after the monthly included allowance.
Checked Sep 11, 2026Published by Darwin · Reviewed Sep 11, 2026Every detail has a source
THE DARWIN DIFFERENCE
Your chat works on getting better.
Darwin keeps trying new openings on the pages you allow it to, and it keeps the ones that get visitors talking and booking. You don't run the tests. You just show up to the meetings.
See how Darwin improvesMotion off
Find your fit
Who is each product for?
Start with the job you need your chat to do.
Darwin
Turn website visits into sales meetings.
Good fit for
- Sales teams booking demos from website traffic.
- Growth teams trying to get more out of every chat.
- Small teams who'd rather not build the setup themselves.
Less suited to
- Businesses that need bots on messaging apps alongside email campaigns.
Chatbots and live chat across messengers and web, inside a marketing suite.
Good fit for
- Small businesses that want a free tier with three bots.
- Marketers already sending email through SendPulse.
- Teams building flows with templates and an OpenAI connection.
Less suited to
- Teams that want openings tested and improved without manual work.
- Sales teams that need real calendar booking inside the chat.
A LITTLE MORE DETAILBefore you
Before you
make the move.
Is SendPulse free?
There's a free tier with three chatbots, 500 subscribers and 10,000 messages a month, no card required, with SendPulse branding on the widget. Pro removes the branding, lifts the limits and is priced by how many subscribers you have. Darwin has no monthly fee on Origin and charges per booked meeting.
57Can SendPulse book meetings?
Does SendPulse have an AI that answers visitors?
Sort of. On a paid plan you can connect OpenAI or Claude to a bot, write it instructions with your company details and FAQs, attach files, and switch on web search if you want. The quality depends on the prompt you write. Darwin's assistant answers from your website and whatever knowledge you add, and you don't have to write a prompt to get it going.
312Does SendPulse test different chat openings?
Not in the guides we read. Flows are built from elements and templates, and SendPulse's own advice is to watch conversations and fix prompts by hand. Darwin does that watching for you: it drafts opening variants per page, tests them against each other, keeps the winner and queues up the next test.
123Sources & methodology12 sources · Published by Darwin
Published by Darwin, using the official documentation linked below. This is a comparison of documented capabilities, not a hands-on benchmark. “Not documented” means the reviewed sources do not establish that capability; it does not prove absence. SendPulse prices its chatbots by subscriber count and connects AI models on paid plans; a subscriber or message is not a booked meeting. Darwin bills for booked meetings. Setup means preparing a draft, not automatically installing it.
- How Darwin improves your openings Darwin · Accessed
- Chatbot builder basics SendPulse · Accessed
Drag-and-drop flows, triggers, templates including appointment booking, OpenAI integration, statistics for sessions, messages, click-throughs and conversions.
- Connect AI models to your chatbot SendPulse · Accessed
Bot settings → Integrations; operator-written instructions; optional web search, files and n8n data; paid plan required; monitor conversations to correct prompts.
- Set up with Darwin Darwin · Accessed
- Set up a live chat SendPulse · Accessed
Widget alignment, color scheme, header text, description; default Welcome message flow; AI models can answer free-form questions.
- Darwin plans and booking prices Darwin · Accessed
- SendPulse chatbot pricing SendPulse · Accessed
Free: 3 chatbots, 500 subscribers, 10,000 messages a month, no card. Pro priced by subscribers (e.g. $42.25 per month for 120,000 on annual billing) with unlimited bots, messages and live chats, no SendPulse branding, ChatGPT integration.
- Connect your scheduling page Darwin · Accessed
- Plans and included meetings Darwin · Accessed
- Understand your conversion reporting Darwin · Accessed
- Create a chatbot flow using a template SendPulse · Accessed
Booking category templates with appointment flows; no calendar integration described.
- Build your assistant’s knowledge Darwin · Accessed