What is the best AI tool to automate lead follow-up?

The one that starts from the lead's own record the moment the lead arrives, lets you set the days and the count, stops on a reply or a booking, and tells you who approved each message. For a company that sells on inquiries by email, that is a CRM with an agent inside, such as Tommos. For a team that already runs outbound sequences, Reply.io; for an agency that sells by text and phone, HighLevel; for a call center, Thoughtly or Regal, by their own pages read October 21, 2026.

Should the tool send follow-ups on its own, or should I approve each one?

Both exist, and the page should say which. Reply.io's Jason AI has an Automatic mode and an Approval mode; HighLevel's Conversation AI has Suggestive and Auto-Pilot; HubSpot's Prospecting agent has Review emails and Send without review; a voice agent is live and nobody reviews it, by their pages read October 21, 2026. In Tommos a person presses Send or Skip on each card. After 12 clean approvals of one kind of reply on a form, Tommo asks to send that kind alone, and you switch it on for that form.

How many follow-ups, and how many days apart?

Tommos defaults to three: the first after 4 days, the next 7 days later; you can set 1 to 60 days and 1 to 10 times, and a reply or a booking stops the run. HubSpot Sequences take delays in business days up to 90 and at most 10 email templates; Reply.io takes delays in days, hours or minutes, by their help pages read October 21, 2026. Thoughtly and Regal do not state a retry cadence on the pages we read.

Does the follow-up stop when the lead replies?

In Tommos yes: the reply comes to the lead's record, Tommo SDR reads it and writes the next card instead of the next follow-up. HubSpot unenrolls a contact from a sequence on a reply or a booked meeting; Reply.io stops a sequence on a reply and books from live calendar slots, by their pages read October 21, 2026. For a voice agent the question does not arise: the call is the follow-up.

What does automated lead follow-up cost at 50 leads a month?

Tommos is $299 a month per company for 50 new leads a month, with the agents and the AI model in the price. Reply.io's Jason AI starts at $500 a month on an annual plan for 1,000 contacts; HighLevel is $97 a month plus $50 or $97 a month per location for the AI Employee; HubSpot's Prospecting agent spends 100 credits, one dollar, a lead on top of a seat; Thoughtly and Regal quote per minute and per agent on request, by their pricing pages read October 21, 2026.

Do I need a phone number or a new sending domain?

For Tommos, no phone number: it has no phone channel. Tommo SDR's replies and follow-ups go from the Google mailbox you connect, as your own letter. The form's thank-you and the booking confirmation go from a sending domain you prove under “Sending domains” in Settings. Either way the lead sees your address, not ours. Thoughtly, Regal and HighLevel call and text, so they run on phone numbers; which number they need and where is not stated on the pages we read. Reply.io caps a mailbox at 200 emails a day on a trial and 400 on a paid plan, by its help center read October 21, 2026.

Does Tommos follow up by SMS or phone?

No. Tommo SDR writes email, from the lead's record, and offers the times in the email and on the booking calendar in your form. A tool on this page that calls or texts is Thoughtly, Regal or HighLevel.

The best AI tools to automate lead follow-up: 6 compared

Five kinds of tool answer to one name#

Automated lead follow-up is the work a tool does after a lead arrives and nobody has answered yet: the first reply, a reminder after a set number of days, and a stop when the lead replies or books, each written from the lead’s record. The tools differ in what starts it, on which channel, how fast the first touch goes, who approves, and what you pay per unit.

Search for an AI tool that automates lead follow-up and five different products answer. A sequencer (Reply.io) sends a cadence of emails and tasks to a list you enroll. An all-in-one for agencies (HighLevel) puts a CRM, text, email and a voice bot under one roof. A voice agent (Thoughtly, Regal) calls the lead back within seconds and talks. A CRM with AI (HubSpot) adds sequences and a prospecting agent to the records you keep. And a CRM whose agents work the inquiry (Tommos) answers the form, offers times, books the call and follows up, from the record, by email.

They are not the same purchase. A sequencer is for a team that already has a list and a CRM. A voice agent is for a business whose leads expect a call. The question is which one answers the lead you actually get: a form on your site, a booking, a reply to a letter.

Six things to check before you pay#

1. What starts the follow-up. A form submitted, a missed call, a new contact in the CRM, a list you enroll by hand. If the trigger is “you enroll the contact”, the first step is still yours.

2. How fast the first touch goes. A lead who filled a form gets an answer at once or waits for a person. The page should say which, and whether a person must press first.

3. Who approves. A draft you send is your work; an agent that sends alone is your reputation; a live call is both. The page should name the rule: a review every time, a review until you trust it, or none.

4. The schedule, and what stops it. How many steps, how many days apart, whether you can change both, and whether a reply or a booking stops the run. A tool that keeps writing after the person answered is worse than none.

5. The booking and the hand-off. The point of the follow-up is a conversation. Does the tool book the time itself, on your calendar, and what does it leave you when the sequence ends: a note, a task, a transferred call?

6. The unit of the price. A seat, a contact, a location, a minute, a credit, or a company. At 50 leads a month a per-minute voice agent and a per-contact sequencer cost very different things from a per-company plan. Check whether the AI’s work spends credits on top.

Six AI follow-up tools compared#

Each cell is from the vendor’s own page, read on October 21, 2026; the number names the source. “Not stated” means the page we read does not say; the vendor may still do it. Prices are the vendors’ list prices on that day. Tommos’s facts are from its own plans and documentation.

What	Tommos	Reply.io, Jason AI	HighLevel	Thoughtly	Regal	HubSpot Starter
What kind of tool it is	A CRM whose agents work each inquiry by email from the record	A sales engagement tool with an AI SDR, “built to scale multichannel outbound”²	An all-in-one platform for agencies with a CRM, Conversation AI and Voice AI⁶	AI voice agents that “respond in seconds, answer questions, qualify leads, and book meetings”¹⁴	Voice AI agents for contact centers, “built by contact center operators”²²	A CRM with Sequences and a Prospecting agent²⁹³¹
What starts a follow-up, and on which channel	A form on your site or a booking page; email, with a booking calendar in the form	A sequence you enroll contacts in; email, LinkedIn, call tasks; SMS and WhatsApp on Multichannel. A form trigger: not stated¹²	Any workflow trigger, “Form Submitted” included; SMS, email, chat, WhatsApp, Facebook, Instagram, voice⁹¹⁰	A webhook, a new CRM contact, an inbound call, a form response; voice, SMS for confirmations¹⁵¹⁷	A HubSpot form or lifecycle change; phone, SMS, chat²²²⁴	You enroll a contact in a sequence; email plus call and LinkedIn tasks. Workflow enrollment needs Enterprise³²³³
Speed to lead: how fast the first touch goes	The first reply to a form is on a card at once, even outside working hours; it goes when you press “Send”, or alone once that kind is switched on	Not stated on the pages read²	Auto-Pilot answers an incoming message itself; a first-touch delay is not stated⁸	“Respond in seconds”; the home page shows a call 10 seconds after a web form reaches Salesforce¹⁴	A call on a real-time trigger; the delay is not stated²⁶	Delays per step in business days; when the first step goes after enrollment is not stated³²
Who approves before it goes out	A person presses “Send” or “Skip” on each card; after 12 clean approvals on a form, a person may switch “Let Tommo send here”	Your choice: “Automatic mode” sends replies; “Approval mode” waits for you²	Three modes: Off, Suggestive (drafts, a person sends), Auto-Pilot (sends itself)⁸⁹	Nobody: the call is live¹⁴	Nobody: the call is live²⁶	Sequences send on schedule; the Prospecting agent has “Review emails” or “Send without review”³²³⁴
The schedule, and what stops it	Default: after 4 days, then every 7, three in all; set 1 to 60 days and 1 to 10 times. A reply or a booking stops it	Delays per step in days, hours or minutes; stops on a reply or a booked meeting⁴²	Set in the workflow; the bot’s own cadence: not stated on the pages read¹⁰	A retry cadence after no answer: not stated¹⁷	“Journeys” on customer behavior; attempts and cadence: not stated²⁶	Delays in business days, up to 90; at most 10 email templates; unenrolls on a reply or a booked meeting³²
Does it book the meeting, and how it hands off	Offers two or three times and books on your Google Calendar; after the last follow-up it writes on the record where the lead stands	Books on Google Calendar from live slots; call steps become tasks with a script for a person²	Books, reschedules and cancels on HighLevel calendars; Voice AI transfers the call to a human number⁸¹¹	Books during the call via Calendly, Cal.com, Acuity, Zoho Bookings or Zoom; warm transfer with a summary¹⁶¹⁸	“AI Bookings Agents”; a transfer to a queue or a number, cold or warm with a spoken summary²²²⁷	Starter: one personal meetings link with HubSpot branding; a person owns the deal after the agent²⁹³⁴
Price, its unit, the trial	$299 a month per company, 50 new leads a month, no seats, the AI model included; 14 days, no card	Email Volume $49 a user a month on an annual plan; Jason AI from $500 a month on an annual plan, 1,000 contacts; 14-day trial of 300 contacts¹³	Starter $97 a month, unlimited users and contacts; AI Employee $50 or $97 a month per location on top, or per use; 14 days, card required⁷¹²¹³	No list prices; “Talk to sales”; FAQ: “starting at just 5 cents per minute”; the 14-day trial makes no calls to leads¹⁹²⁰²¹	No list prices; a custom quote; guideline “at least 25 agents and at least 100k minutes” a month²³	Starter from $20 a seat a month, $7 on an annual plan as a limited offer; 500 credits; the Prospecting agent spends 100 credits a lead²⁹³⁰
A CRM inside, or plugs into one	The CRM is the product; your own Claude or ChatGPT works it over MCP	No CRM; Salesforce, HubSpot, Pipedrive, Copper, Close¹	A CRM inside⁶	No CRM; HubSpot, Salesforce, GoHighLevel, Zoho, Pipedrive, Attio, Keap¹⁶	No CRM; “40+ integrations”, Salesforce, HubSpot, Dynamics, Zoho among them²⁵	The Smart CRM inside²⁹

Two notes on HubSpot. Its Sales Hub pricing grid lists Sequences on Starter; its Knowledge Base says Professional and Enterprise, so check your own account before you count on them.²⁹³²³³ Its Prospecting agent page names calls and LinkedIn as well as email; the agent runs on credits, 100 a lead, that expire at the end of the month.³⁰³¹

How lead follow-up runs in Tommos#

Tommos (tommos.ai) is a CRM whose AI agents, the tommos, take a B2B inquiry to a signed contract. The follow-up is not a feature bolted onto the CRM; it is what Tommo SDR does with every inquiry that comes through your form or your booking page. See the plans.

The lead’s record is the trigger. A visitor submits the form on your site; when you have ticked “Send an auto-confirmation email to the submitter”, the form’s own thank-you goes to them: at once on a form without the booking calendar, a few minutes later on a form with it, so a visitor who books gets one letter. Tommo SDR reads what they wrote, your “Playbook” and the record, writes the first real answer in your voice, offers two or three times to meet, and puts it on a card.

A person decides each email, until they decide not to. You press “Send” or “Skip”, or edit the letter on the card first. When the lead’s working day is over, the card offers “Send on” their next morning, with the day and hour on their clock, beside “Send now”. After 12 clean approvals of one kind of reply on a form (an admin can set 1 to 100), Tommo asks to send that kind alone, and you switch “Let Tommo send here” for that form, on a paid plan.

The schedule is yours. If nobody answers, Tommo follows up on the schedule you set: by default the first after 4 days, the next 7 days later, three in all; you can set 1 to 60 days and 1 to 10 times. A reply stops it: Tommo reads the answer and writes the next card instead. A booking stops it too. After the last follow-up, Tommo sends no more; it writes on the record where the lead stands and what it would do next, and the lead is yours to pick up.

The booking is in the same record. With “Show the booking calendar” under “After submit”, a visitor who wants to talk picks a time right after the form; otherwise they pick one of the times in the email. Either way the meeting lands on your Google Calendar and on the lead’s record, with a confirmation written to the record as your letter.

One price per company. Book is $299 a month for 50 new leads a month, no seats, the AI model included. Your own Claude or ChatGPT can read and write the same records over MCP, at app.tommos.ai/api/mcp; what it can do.

Set up automated follow-up in Tommos#

A person sets this up once; Tommo SDR runs it on every inquiry after that.

1
Open the workspace
Sign in with your Google work account at tommos.ai/signup. Your workspace opens at once. 14 days of everything, no card. On the start path press “Connect mail and calendar”: one Google consent gives Tommo your mail and your Google Calendar, and the start makes the meeting “Intro call”, 30 minutes, with a Meet link on each booking.
2
Put the form on your site
On the “Forms” page, create a form, switch on “Tommo SDR works the leads from this form”, and paste its embed code where your “Contact us” form stands today. Under “After submit”, choose “Show the booking calendar” so a visitor who wants to talk picks a time right there. Tick “Send an auto-confirmation email to the submitter” for the form’s own thank-you; on a form with the calendar it goes a few minutes later, only to a visitor who did not book.
3
Correct the Playbook
At the start, Tommo reads your site and writes the “Playbook” pages: who you are, who your buyers are, what you offer and how you describe yourselves. Fix what is wrong. Every reply and every follow-up is written from these pages and from the lead’s record.
4
Set the follow-up schedule
On Tommo SDR’s page, under “When it follows up a silence”, keep the default or set “First, after days” and “Then every, days” (1 to 60) and “At most” (1 to 10). A reply or a booking stops the run.
5
Decide the first cards
Each inquiry brings a card with the reply and the times offered. Press “Send” or “Skip”, or edit the letter on the card. After 12 clean approvals on that form, Tommo asks to send alone; switch “Let Tommo send here” when you are ready.

Which tool to pick#

Your leads expect a phone call back within a minute, and you have the volume for it. A voice agent: Thoughtly bills per minute and books during the call; Regal is built for contact centers and quotes from 25 agents up, by their pages.¹⁴¹⁹²³
You run an agency that sells by text and phone and want one roof for all of it. HighLevel: a CRM, Conversation AI in three modes and Voice AI, from $97 a month plus the AI Employee per location.⁷⁹¹²
You already have a CRM and a list, and you want a cadence sent for you. Reply.io: delays per step, Google Calendar booking, an approval mode for Jason AI’s replies.²⁴
Your leads are inquiries by email, and you want each one answered, booked and followed up from its record, with you deciding every email. That is Tommos: one price per company, the agents inside it, and your own Claude welcome beside them.

Questions about automating lead follow-up#

What is the best AI tool to automate lead follow-up?: The one that starts from the lead's own record the moment the lead arrives, lets you set the days and the count, stops on a reply or a booking, and tells you who approved each message. For a company that sells on inquiries by email, that is a CRM with an agent inside, such as Tommos. For a team that already runs outbound sequences, Reply.io; for an agency that sells by text and phone, HighLevel; for a call center, Thoughtly or Regal, by their own pages read October 21, 2026.
Should the tool send follow-ups on its own, or should I approve each one?: Both exist, and the page should say which. Reply.io's Jason AI has an Automatic mode and an Approval mode; HighLevel's Conversation AI has Suggestive and Auto-Pilot; HubSpot's Prospecting agent has Review emails and Send without review; a voice agent is live and nobody reviews it, by their pages read October 21, 2026. In Tommos a person presses Send or Skip on each card. After 12 clean approvals of one kind of reply on a form, Tommo asks to send that kind alone, and you switch it on for that form.
How many follow-ups, and how many days apart?: Tommos defaults to three: the first after 4 days, the next 7 days later; you can set 1 to 60 days and 1 to 10 times, and a reply or a booking stops the run. HubSpot Sequences take delays in business days up to 90 and at most 10 email templates; Reply.io takes delays in days, hours or minutes, by their help pages read October 21, 2026. Thoughtly and Regal do not state a retry cadence on the pages we read.
Does the follow-up stop when the lead replies?: In Tommos yes: the reply comes to the lead's record, Tommo SDR reads it and writes the next card instead of the next follow-up. HubSpot unenrolls a contact from a sequence on a reply or a booked meeting; Reply.io stops a sequence on a reply and books from live calendar slots, by their pages read October 21, 2026. For a voice agent the question does not arise: the call is the follow-up.
What does automated lead follow-up cost at 50 leads a month?: Tommos is $299 a month per company for 50 new leads a month, with the agents and the AI model in the price. Reply.io's Jason AI starts at $500 a month on an annual plan for 1,000 contacts; HighLevel is $97 a month plus $50 or $97 a month per location for the AI Employee; HubSpot's Prospecting agent spends 100 credits, one dollar, a lead on top of a seat; Thoughtly and Regal quote per minute and per agent on request, by their pricing pages read October 21, 2026.
Do I need a phone number or a new sending domain?: For Tommos, no phone number: it has no phone channel. Tommo SDR's replies and follow-ups go from the Google mailbox you connect, as your own letter. The form's thank-you and the booking confirmation go from a sending domain you prove under “Sending domains” in Settings. Either way the lead sees your address, not ours. Thoughtly, Regal and HighLevel call and text, so they run on phone numbers; which number they need and where is not stated on the pages we read. Reply.io caps a mailbox at 200 emails a day on a trial and 400 on a paid plan, by its help center read October 21, 2026.
Does Tommos follow up by SMS or phone?: No. Tommo SDR writes email, from the lead's record, and offers the times in the email and on the booking calendar in your form. A tool on this page that calls or texts is Thoughtly, Regal or HighLevel.

Sources#

Reply.io, “Pricing”, read Oct 21, 2026
Reply.io, “Jason AI, AI SDR Agent”, read Oct 21, 2026
Reply.io Help Center, “Trial period”, read Oct 21, 2026
Reply.io Help Center, “Step delays management”, read Oct 21, 2026
Reply.io Help Center, “Existing limits in Reply”, read Oct 21, 2026
HighLevel, home page, read Oct 21, 2026
HighLevel, “Pricing”, read Oct 21, 2026
HighLevel Help, “Conversation AI bot explained”, read Oct 21, 2026
HighLevel Help, “How to set up a Conversation AI bot”, read Oct 21, 2026
HighLevel Help, “Workflow action: AI Agent”, read Oct 21, 2026
HighLevel Help, “Voice AI agent transfer”, read Oct 21, 2026
HighLevel Help, “AI products pricing”, read Oct 21, 2026
HighLevel, “CRM for agencies”, read Oct 21, 2026
Thoughtly, home page, read Oct 21, 2026
Thoughtly Docs, “Introduction”, read Oct 21, 2026
Thoughtly, “Integrations”, read Oct 21, 2026
Thoughtly Docs, “Automation triggers”, read Oct 21, 2026
Thoughtly Docs, “Actions”, read Oct 21, 2026
Thoughtly, “Pricing”, read Oct 21, 2026
Thoughtly Docs, “FAQ”, read Oct 21, 2026
Thoughtly Docs, “Billing”, read Oct 21, 2026
Regal, home page, read Oct 21, 2026
Regal, “Pricing”, read Oct 21, 2026
Regal, “HubSpot integration”, read Oct 21, 2026
Regal, “Automated lead qualification”, read Oct 21, 2026
Regal Developer Docs, “Deploy outbound voice agents”, read Oct 21, 2026
Regal Developer Docs, “Transfer call”, read Oct 21, 2026
Regal Developer Docs, “Plan your implementation”, read Oct 21, 2026
HubSpot, “Sales Hub pricing”, read Oct 21, 2026
HubSpot, “HubSpot Credits”, read Oct 21, 2026
HubSpot, “AI Prospecting Agent”, read Oct 21, 2026
HubSpot Knowledge Base, “Create and edit sequences”, read Oct 21, 2026
HubSpot Knowledge Base, “Enroll contacts in a sequence”, read Oct 21, 2026
HubSpot Knowledge Base, “Set up and use the prospecting agent”, read Oct 21, 2026

The best AI tools to automate lead follow-up: six compared

Five kinds of tool answer to one name#

Six things to check before you pay#

Six AI follow-up tools compared#

How lead follow-up runs in Tommos#

Set up automated follow-up in Tommos#

Open the workspace

Put the form on your site

Correct the Playbook

Set the follow-up schedule

Decide the first cards

Which tool to pick#

Questions about automating lead follow-up#

Sources#

Read next

Let Tommo SDR take the next inquiry

Rather see it first?