Ask any sales engineer where their week goes and you'll hear the same answer. They run the same first demo again and again and answer the same product questions on every call. Then a 200-question RFP (request for proposal) lands on their desk.
None of that work needs a senior SE but it still has to get done.
That's the gap presales AI tools are trying to fill. I went through the main ones to see which actually take work off a sales engineer's plate and which just add another dashboard.
I kept the list to 6 and split them by the job they do. If you only read one thing then read the table.
TL;DR:
Flagon: My pick for most teams. It runs the first demo on your real product so SEs only meet buyers who are ready.
Hero by Vivun: An AI teammate that preps your reps and helps on live calls from $20 a month
1Mind: Impressive but enterprise only with no public pricing
Consensus: Solid if your team already builds a lot of recorded demos
Karumi: Live demos over a video call but you need a sales call to get a price
Responsive: Worth it only if RFPs are your real bottleneck
What presales AI tools actually do
"Presales AI" gets slapped on a lot of products. Once you look closer most of them do one of four jobs:
Run the demo for you: An AI agent shows the product to buyers so no SE has to
Help the SE prepare: AI researches the deal and drafts follow-ups
Package demo content: Tools that help you record and share product tours
Answer RFPs: AI drafts responses to the long question lists big buyers send vendors
The first one saves the most hours. Most of an SE's week goes into early calls with people who aren't ready to buy. Move those to an agent and your SEs get their week back.
How I picked these tools
I looked at each tool through one question: how many SE hours does it really give back?
Then I checked the things that decide whether a team can actually use it:
Real product or recordings: I care whether buyers see the live product. Recorded tours go stale every release.
Price you can find: A tool that hides its price usually costs a lot.
Free test: I gave more weight to tools you can try on your own product.
Setup time: A one-month implementation is a real cost even if nobody invoices it.
Handoff: The SE should walk into the call knowing what the buyer already asked.
6 best presales AI tools compared
| Tool | Best for | Presales job it automates | Starts at | Free trial | Live product demos without an SE | Time to go live | Pricing model |
|---|---|---|---|---|---|---|---|
| Flagon | Best overall for presales and GTM teams | First demos and lead qualification | $99/mo | ✅ 100 demo minutes, no credit card | ✅ On every plan | About 10 minutes | Pay only for live demo minutes |
| Hero by Vivun | Reps and SEs who want call prep | Call prep, live call help, follow-ups | $20/mo per seller | ✅ 28 days, no card | ❌ | Not published | Per seller |
| 1Mind | Enterprise SE teams with big budgets | Live calls as a virtual SE | Not public | ❌ | ✅ | Not published | Custom |
| Consensus | Enterprise demo programs | Video demos and product tours | $600/mo | ❌ | ❌ Recorded demos | After you build demos | Per user plus usage |
| Karumi | Live demos on a video call | First demos on a video call | Not public | ❌ | ✅ | Not published | Custom |
| Responsive | Teams with heavy RFP volume | RFP and questionnaire answers | From $10,000 | ❌ | ❌ | Not published | Annual platform fee plus users |
My honest review of the 6 presales AI tools
1. Flagon
Flagon does one presales job really well. It runs the first demo for you.
A buyer opens a link or clicks the demo button on your site. An AI agent opens your actual product in a browser and walks them through it by voice. Buyers can ask questions out loud and interrupt to change direction. The agent clicks to whatever they want to see.
Here are the 2 things that stood out to me:
It shows the real product: Most tools on this list replay something your team recorded. Flagon drives the live app including the parts behind a login so the demo never goes out of date.
The price makes sense for a small team: Live product demos start at $99/mo while Karumi and 1Mind don't show a price until you talk to sales.
My take on Flagon
What I like most is what lands with the SE after the demo. Every session comes back with a lead score and the reason behind it along with the full transcript and every screen the agent showed. Your SE walks into the call already knowing what the buyer cares about.
Setup is also refreshingly short. You point it at your product and give it your docs and the questions you want asked. Then you share the link. Most teams are live in about 10 minutes.
It won't help with RFPs or deal research. It's built for one job and that job happens to eat most of an SE's week.
Pros
Runs your real web app live including logged-in areas
Voice demos in 10 languages
Asks your qualification questions while it demos
Every lead scored with the reason why
Learns from questions it couldn't answer
Unlimited products and demos on every plan
Cons
CRM and Slack sync start on the Pro plan
Works with web apps only so desktop software is out
Flagon pricing
| Plan | Price | Best for | What you get |
|---|---|---|---|
| Free trial | $0 | Testing on your own product | 100 demo minutes, no credit card |
| Starter | $99/mo | Founders and small teams | 250 demo minutes a month |
| Pro | $189/mo | Growing presales teams | 500 demo minutes plus integrations |
| Scale | $369/mo | High-volume teams | 1,000 demo minutes plus integrations |
You pay for demo minutes only. Products and demos are unlimited on every plan.
What Flagon's users say
Start free with 100 demo minutes
2. Hero by Vivun
Hero is the AI sales teammate from Vivun. You may know it as Ava. It doesn't talk to buyers. It works behind the scenes for your reps and SEs.
My take on Hero
Think of Hero as a very fast junior SE. Before a call it pulls who's on the call and the deal stage from your CRM and past calls. On the call it shows you a private agenda and suggests what to say when a competitor or pricing question comes up. After the call it drafts the follow-up in your voice.
The customer logos back it up: ADP, Dayforce, DocuSign and Freshworks all use it. It's also easy to try because the Individual plan is $20 a month per seller with 28 days free.
What it doesn't do is cut the number of calls your SEs take. Every buyer still needs a human demo. So Hero won't fix it if your problem is too many early calls.
Pros
Strong deal research and call prep
Live help during calls
Plugs into Salesforce, Zoom, Teams, Slack and Gmail
Cons
Buyers can't self-serve a demo
Team plan isn't out yet
Avatar and voice modes are Enterprise only
Hero pricing
| Plan | Price | Best for | What you get |
|---|---|---|---|
| Individual | $20/mo per seller | Solo sellers | Live call help, transcription and CRM connections with 28 days free |
| Team | Coming soon | Sales teams | Shared workspaces, seat management and analytics |
| Enterprise | Custom | Large sales orgs | Avatar and voice modes, SSO and advanced analytics |
What Hero's users say
3. 1Mind
1Mind takes the boldest swing on this list. Its AI avatar Mindy joins live Zoom and Teams calls as a virtual sales engineer.
My take on 1Mind
The idea is impressive. An avatar that sits on a real sales call and fields technical questions is exactly what a stretched SE team dreams about. Big names like HubSpot, Salesforce and ZoomInfo use it.
The catch is access. 1Mind doesn't publish pricing and there's no way to try it yourself. You go through a sales call before you see it on your own product.
It's worth a look for enterprise teams with budget for a custom rollout. Smaller teams will find it hard to get started.
Pros
Joins live sales calls as a virtual SE
Handles qualification through to booking a meeting
Proven with large enterprise customers
Cons
No public pricing
No free trial
No self-serve option
1Mind pricing
| Plan | Price | Best for | What you get |
|---|---|---|---|
| Custom | Contact sales | Enterprise revenue teams | Agents for website visitors, live calls and in-product guidance |
What 1Mind's users say
4. Consensus
Consensus has been in demo automation for a long time. It helps teams record video demos and tours and share them with buyers. In 2026 it bought Saleo to add live demo data and an AI agent layer.
My take on Consensus
The feature I find most useful is stakeholder discovery. When a buyer forwards your demo Consensus shows you who else watched it. That's gold on a big deal.
But the core is still recorded content. Someone on your team has to build and update those demos every time the product changes. Buyers also watch the demo rather than explore the product.
It's a good fit for enterprise teams that already run a demo library. It's a lot of setup for a team that just wants fewer first calls.
Pros
Shows who else on the buying team watched
AI help with scripts, voiceovers and translation
Free integration with your tech stack
Cons
Buyers watch recordings instead of the live product
No free trial
Agent pricing isn't public
Consensus pricing
| Plan | Price | Best for | What you get |
|---|---|---|---|
| Standard | From $600/mo | Teams building a demo library | Per-user licenses with video demos and tours |
| Enterprise | Custom | Large enterprises | Custom setup and usage-based add-ons |
What Consensus users say
5. Karumi
Karumi is a Y Combinator startup. Its agent joins a video call with the buyer and drives your live product on screen.
My take on Karumi
Karumi gets the important part right. Buyers see the real product. It also keeps learning the product as you ship, which matters if you release often.
The video call format feels familiar to buyers who expect a "meeting." It also offers agents for onboarding and Slack support plus a copilot for reps so it works more like a suite.
My hesitation is the price. Karumi doesn't publish it so you need a sales call to find out. You can build a first-pass demo agent for free but going live means talking to sales.
Pros
Live product demos on a video call
Keeps up with product changes automatically
Strong security: SOC 2 Type II, ISO 27001 and GDPR
Cons
No public pricing
Going live needs a sales call
Karumi pricing
| Plan | Price | Best for | What you get |
|---|---|---|---|
| Free first-pass agent | $0 | Trying it on your product | A draft demo agent you can refine |
| Paid plans | Contact sales | Teams going live | Pricing isn't published |
What Karumi's users say
6. Responsive
Responsive (it used to be called RFPIO) is built for one painful job which is answering RFPs (requests for proposal) and security questionnaires.
My take on Responsive
Anyone who has filled out a 300-row security spreadsheet will get why this exists. You upload the file and Responsive's AI drafts answers from your approved library. Experts review only what they need to and it exports in whatever format the buyer wants.
It's on this list because RFPs eat real SE time in enterprise sales. But it has nothing to do with demos or early buyer conversations.
I'd only add it if RFPs are clearly where your team's hours disappear.
Pros
Answers come from your approved content
Review workflow keeps experts in the loop
Works with Word, Excel and PDF files
Cons
Covers RFPs only and does nothing for demos
No free plan and it starts at $10,000
Custom AI and premium connectors sit on Enterprise
Responsive pricing
| Plan | Price | Best for | What you get |
|---|---|---|---|
| Emerging | From $10,000 | Growing RFP teams | Unlimited response projects plus AI and automation studio |
| Growth | Contact sales | Larger teams | Intake requests, eSignature and advanced integrations |
| Enterprise | Contact sales | Global teams | Custom AI, enterprise security and advanced reporting |
What Responsive's users say
How I'd choose a presales AI tool
1. Find where your SEs actually lose time
Look at last month's SE calendar. Start with an AI demo agent if it's full of first demos. Look at an AI teammate like Hero if it's mostly deal prep and follow-ups. Get an RFP tool if RFPs take up most of it.
2. Prefer the live product over recordings
Every recorded tour is a small maintenance job waiting to happen. Tools that run your real product stay current on their own.
3. Do the real math on price
The entry price rarely tells the full story. Add seats, annual minimums and the plan you'd actually need for the AI features.
4. Test it on your own product
Watching a vendor demo their own product proves very little. Try it on yours before you sign anything.
5. Count setup as a cost
Ten minutes and two months are very different investments. Ask how long until a real buyer sees it.
6. Check what your SE gets after
The best tools hand your SE the buyer's questions, a lead score and the full conversation before the first call.
So which presales AI tool would I pick?
It depends on the job. Hero is the strongest helper for reps and SEs on live calls. Responsive is the answer if RFPs are drowning your team. Consensus fits teams already invested in recorded demos. 1Mind and Karumi run live demos but you need a sales call before you see a price.
If I were running a presales team today I'd start with Flagon. Here's why:
It takes the first demo off your SEs completely
Buyers see your real product instead of a recording
It starts at $99/mo with unlimited products and demos
You can be live in about 10 minutes and test it free
FAQ
What are presales AI tools?
Presales AI tools automate technical selling work such as product demos, deal prep, call support and RFP answers. They free sales engineers to focus on qualified deals.
What is the best presales AI tool in 2026?
Flagon is the best presales AI tool for most teams. It runs your real product live for every buyer from $99 a month and goes live in about 10 minutes. You can start free with 100 demo minutes.
What is an AI sales engineer?
An AI sales engineer is software that does work a human SE would do. Some run product demos for buyers. Others research deals and support reps on calls.
Will presales AI replace sales engineers?
It won't replace them. It handles repeat work like first demos and RFP drafts so your SEs can spend their time on complex technical deals and buyers who are ready.
How much do presales AI tools cost?
Flagon starts at $99 a month. Hero by Vivun starts at $20 a month per seller. Consensus starts at $600 a month and Responsive starts from $10,000. 1Mind and Karumi don't publish prices.
Which presales AI tools have a free trial?
Flagon gives you 100 free demo minutes in your first month with no credit card. Hero by Vivun gives you 28 days free with no card. Karumi lets you build a first-pass demo agent for free. Most others need a sales call.