Reply.io vs AiSDR: In-Depth AI SDR Comparison

If you're weighing Reply.io vs AiSDR, you're choosing between an AI SDR plan inside a sales engagement platform and a standalone AI SDR agent. I priced one job on all three tools: reaching about 2,000 new B2B prospects a month by email and LinkedIn.

I checked every price on each vendor's live pricing page on October 8, 2026. Reply.io runs email, LinkedIn, call, and SMS sequences, and sells Jason after a demo. AiSDR researches each lead before it writes and starts at $250/mo.

Agent Frank is Salesforge's autonomous AI SDR. On that 2,000-prospect job, Frank and 20 Megaforge mailboxes cost $568/mo on annual billing, against $800/mo for Jason and $2,000/mo for AiSDR Scale.

AI SDR Comparison at a Glance: Reply.io vs AiSDR

Reply.io Overview: Jason AI SDR Pricing, Features, and Limits

Reply.io is a sales engagement platform for email, LinkedIn, call, SMS, and WhatsApp sequences. Its pricing page cites 10+ years in business, 3,000+ companies, and a 4.6/5 G2 rating from 1,448 reviews.

Jason is Reply's AI SDR, sold as its own plan. It finds prospects from a plain-language ICP prompt, writes and sends sequences, handles replies, and books meetings.

Core features

• AI-built ICP and playbook: Jason studies your product and value proposition, then defines your ideal customer.
• Real-time data: Reply says Jason searches 1+ billion contacts, including 220M+ US contacts and 15M+ US companies.
• Intent signals: hiring activity, technology use, company growth, LinkedIn engagement, and competitor following.
• Channels: email, LinkedIn requests and messages, AI voice messages in your own voice, and call steps with a script per prospect.
• Autopilot or copilot: Jason sends on its own, or you approve each message first.
• Languages and models: 50+ languages, with a choice of Claude, Gemini, Mistral, or OpenAI behind it.
• Deliverability: unlimited mailboxes and warm-ups on AI SDR plans, with warm-up running in Mailtoaster.ai.

Pricing

Reply sells Jason by active contacts: unique people who get a first email in a month, with unlimited follow-ups. Annual billing cuts Jason's price by 33-40%.

• AI SDR Starter: $500/mo billed annually or $800/mo monthly for 1,000 contacts; $800 or $1,200 for 2,000; $1,000 or $1,500 for 3,000.
• AI SDR Growth: $1,500/mo annually or $2,500/mo monthly for 5,000 contacts, and $3,000 or $5,000 for 10,000. It adds white-glove onboarding, a Slack channel, and custom playbooks.
• AI SDR Enterprise: custom pricing for 25,000-50,000 contacts.
• Human-run plans: Email Volume from $49/user/mo annually ($59 monthly), and Multichannel at $89/user/mo annually ($99 monthly).

When I checked the page, every AI SDR plan button led to a demo booking. Hackceleration's June 2026 check lists Jason from $500/mo, and SalesRobot's Jason review lists AI SDR Starter at $800/month and AI SDR Growth at $2,500/month.

Who Reply.io is best for

Reply.io fits sales teams and agencies that run human-led sequences across email, LinkedIn, calls, and SMS, and want an AI SDR from the same vendor. Agencies can add an AI SDR per client from $500/mo each.

Limitations and what reviewers say

• Jason charges for every new prospect: $0.50-$0.80 per contact at the 1,000-contact tier, depending on billing.
• LinkedIn accounts are limited. Reply's plan comparison lists 1 LinkedIn account per team on AI SDR plans.
• Add-ons stack up on human-run plans. On Email Volume, LinkedIn costs $69/mo per account, and calls with SMS cost $29/mo per account.
• Trustpilot reviewers report real problems. An April 2026 1-star review says Jason's copy read as obvious AI writing, and a September 2026 review says contacts marked finished kept getting messages.

Reply's pricing page still shows a 4.6/5 G2 rating, so weigh both sides. This Reply.io review lists 13 pros and cons, and Agent Frank vs Jason compares the two agents directly.

AiSDR Overview: Pricing, Features, and Limits

AiSDR is an AI SDR agent that looks across the web for people whose problems match what you sell, then writes to them by email and LinkedIn. The pitch on its homepage is lead quality, not volume.

More than 250 companies use it, according to its pricing page. Per UsagePricing's tracker, AiSDR has changed its pricing meter twice since 2024: from emails sent, to messages and credits, to researched contacts in mid-2026.

Core features

• Researched contacts: every lead is researched before the first message, and those researched contacts are what you pay for.
• Ami AI: an AI strategist that comes up with GTM ideas, analyzes performance, and builds new campaigns.
• LinkedIn steps: connection requests, direct messages, and InMail.
• Phone steps: AI call steps run through an Aircall dialer.
• Fast replies: answers go out within 5-10 minutes, or wait for your approval in co-pilot mode.
• Turnkey email setup: AiSDR buys your mailboxes and handles setup and warm-up.
• Your own data: from Explore up, it works with your existing lead lists and tracks LinkedIn post engagement and profile visits.
• CRM sync: two-way HubSpot sync on every plan, and two-way Salesforce sync on Scale.

Pricing

AiSDR lists three plans on its live pricing page. Paying yearly takes 20% off, and the two larger plans need a quarterly contract paid in advance.

• AiSDR Solo: $250/mo with no contract, or $200/mo billed annually. You get 200 researched contacts, 1 user, 1 domain, 3 mailboxes, and 1 LinkedIn account.
• AiSDR Explore: $900/mo, or $720/mo annually, for 800 contacts, unlimited users, 2 domains, 6 mailboxes, and 5 LinkedIn accounts.
• AiSDR Scale: $2,500/mo, or $2,000/mo annually, for 2,500 contacts, 6 domains, 18 mailboxes, and 20 LinkedIn accounts.

Having AiSDR's team run campaigns costs $149 more per campaign on Explore, or $2,500/mo more on Scale. Hackceleration's June 2026 check shows the same plans and confirms there's no free plan or free trial.

Who AiSDR is best for

AiSDR suits a founder or small team that wants to try an AI SDR for a month or two before committing. Solo is the one plan you can buy without talking to sales.

Limitations and what reviewers say

• Each contact is expensive: $1.25 on Solo, about $1.13 on Explore, and $1.00 on Scale.
• Sender limits: no plan goes past 18 mailboxes or 20 LinkedIn accounts.
• A long ramp: AiSDR says warming several inboxes takes 30+ days, and teams see their strongest results after about 6 weeks.
• Pre-built playbooks: MarketBetter's 2026 breakdown says G2 reviewers often describe AiSDR's playbooks as pre-built.

I found no Trustpilot reviews for AiSDR, so these points come from its pricing page and outside reviewers. For more, read these AiSDR reviews or the Agent Frank vs AiSDR comparison.

Agent Frank Overview: Salesforge's Autonomous AI SDR

Agent Frank is the AI SDR inside Salesforge, built by a team led by a former VP of Sales. He works around the clock, from finding a prospect to booking the meeting.

You manage him from a complimentary Salesforge workspace that shows every message he sends. Salesforge positions him as help for your reps, not a replacement. This AI SDR vs SDR breakdown compares their cost and results.

Core features

• Nonstop prospecting: he pulls leads from Leadsforge's 500M+ B2B contacts, and the lists flow into his sequences with no CSV exports.
• Enrichment first: he enriches and verifies contact and company data before he writes.
• AI personalization across 21+ languages: messages draw on your Knowledge Base and each prospect's website, blog, and LinkedIn posts, in 9 tones.
• One sequence, two channels: email and LinkedIn steps branch on what each prospect does.
• Auto-Pilot or Co-Pilot: give him full control, or approve every draft before it goes out.
• Meeting booking: he books meetings onto your reps' calendars, or asks for the prospect's link, within the hours you set.
• No sender caps: connect unlimited mailboxes and LinkedIn profiles.
• Primebox™: replies from both channels land in one inbox, sorted by sentiment.
• Built-in deliverability: free Warmforge warm-up on every mailbox, plus Megaforge mailboxes across four providers.
• Human support: a dedicated Account Manager and a shared Slack channel come with every account.

This tutorial shows his setup and a live campaign.

How he fits the Forge Stack

Frank sits on top of the Forge Stack, which puts infrastructure, warm-up, lead data, outreach, and an AI SDR under one roof. That means Mailforge, Infraforge, and Primeforge for mailboxes, Warmforge for deliverability, Leadsforge for data, and Salesforge for sequences.

The three infrastructure products share one login, so moving from shared to private to Google and Microsoft mailboxes needs no migration. Each Forge product also runs over MCP, so Claude, Cursor, or an agent you build can operate it.

You also choose who runs the stack: your own reps, Agent Frank, or a vetted Forge Expert agency.

Pricing

When I switched the billing toggle on Agent Frank's page, it showed $599/mo billed quarterly and $499/mo billed annually, which is 2 months free. Either price buys 1,000 Active Contacts, the leads he's talking to at one time.

Salesforge puts that at 2,000-2,500 new leads and 6,000-7,500 personalized emails a month. At 2,000+ contacts a month, that works out to about $0.25 per contact.

Mailboxes aren't included. Connect your own, buy Infraforge from $33/mo for 10 billed annually, or add Megaforge from $69/mo for 20.

Salesforge's own plans are separate and only needed if your reps also send by hand. Salesforge Pro costs $48/mo monthly ($40/mo annual), and Salesforge Growth costs $96/mo monthly ($80/mo annual), each with a 14-day free trial (verify the live price).

Who Agent Frank is best for

Salesforge's published fit is B2B sellers with $5K-$100K ACVs who sell to startups, SMBs, or mid-market companies and target 3,000+ businesses.

If you mostly target Fortune 500 companies, depend on long RFP cycles, or close six- and seven-figure deals, Salesforge says to look elsewhere.

Proof and honest limits

After a few months, VAI Consulting and Salesforge pivoted Frank to a more focused ICP and aligned messaging. In the first week after that pivot, he booked 3 calls, with 62.5% replies.

• No free trial. He's sold only after an Agent Frank demo.
• His first emails wait for a 2-week warm-up, which Warmforge runs at no extra cost.
• Mailboxes cost extra, and billing is quarterly at the shortest.

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Head-to-Head AI SDR Feature Comparison: Reply.io vs AiSDR

Below, I compare the three on eight jobs every AI SDR has to do, using each vendor's own pages plus a few user reviews.

Multichannel outreach: email, LinkedIn, calls, and SMS

Reply.io: Jason builds sequences that mix email, LinkedIn, and call steps, and it writes a call script for each prospect. Reply's rep-run Multichannel plan adds SMS and semi-automated WhatsApp.

AiSDR: every plan covers email, LinkedIn requests, DMs, and InMail, plus AI call steps through Aircall. LinkedIn accounts rise from 1 on Solo to 5 on Explore and 20 on Scale.

Agent Frank: email and LinkedIn share a single sequence, and the next step depends on whether the prospect connected, replied, or ignored the last touch. His price stays the same whether you connect 2 LinkedIn profiles or 40.

If phone, SMS, or WhatsApp drive your pipeline, Reply.io covers those channels today. Salesforge's phone channel is still on its roadmap.

Email deliverability and warm-up

Reply.io: AI SDR plans include unlimited mailboxes and warm-ups through Mailtoaster.ai, and Reply runs deliverability for you. It also sells pre-warmed domains from $25 a year, plus $15 per mailbox a month.

AiSDR: its team buys your mailboxes and handles setup and warm-up. AiSDR says getting several inboxes ready takes 30+ days, one reason Explore and Scale use quarterly terms.

Agent Frank: Warmforge warms each of his mailboxes for free in a premium pool of aged IMAP/SMTP, Google Workspace, and Microsoft 365 inboxes, and scores each one with a Heat Score™. Megaforge splits 20 mailboxes evenly across Gmail, Outlook, Mailforge, and Infraforge at about 15 emails a day each, so trouble at one provider doesn't stall a campaign.

This cold email deliverability guide covers the foundations, and Salesforge's free outreach tools include an inbox placement test.

AI personalization and autonomy

Reply.io: Jason researches each prospect on LinkedIn and company websites, then writes from your playbook in 50+ languages. You can also pick the model behind it: Claude, Gemini, Mistral, or OpenAI.

AiSDR: research happens in real time for every lead, with unlimited AI personas. Scale adds AI videos in messages and AI voice notes on LinkedIn.

Agent Frank: he writes from your Knowledge Base and each prospect's website, blog, and LinkedIn posts, in 21+ languages and 9 tones. Auto-Pilot lets him send and reply alone, and Co-Pilot holds every draft for your approval.

On language coverage alone, Jason's 50+ is more than double Frank's 21+.

Lead data and buying signals

Reply.io: Reply says Jason searches 1+ billion contacts and watches hiring, technology, growth, and LinkedIn engagement signals. One Trustpilot reviewer said its filters returned many off-target contacts.

AiSDR: it searches the web in real time for people whose problems match what you sell. From Explore up, it also works with your existing lead lists and tracks LinkedIn engagement.

Agent Frank: his leads come from Leadsforge's 500M+ contacts, filled in by waterfall enrichment. Leadsforge can also build lists from funding rounds, job changes, and tech stack shifts, plus company lookalikes and your competitors' followers.

This guide to B2B buying signals covers 15 signals worth tracking.

Reply handling and inbox

Reply.io: every plan includes a unified inbox with AI reply handling and reply categorization. Jason can answer on autopilot or prepare drafts on copilot.

AiSDR: the AI responds within 5-10 minutes, or holds its drafts for your approval in co-pilot mode.

Agent Frank: email and LinkedIn replies both land in Primebox™, tagged positive, neutral, or negative. Primebox™ catches answers sent from a different address than the one Frank used, and it has a mobile app. You can also save reply templates and set follow-up reminders.

Pricing and scalability

Reply.io: Jason is billed per new contact each month, about $0.50-$0.80 at 1,000 contacts and $0.30-$0.50 at 10,000, depending on billing. Every AI SDR plan includes unlimited users.

AiSDR: you pay per researched contact, from $1.25 on Solo down to $1.00 on Scale, and anything above Solo needs a quarterly contract.

Agent Frank: he's billed per Active Contact, meaning leads he's working at the same time. One thousand of them turn into 2,000-2,500 new leads a month, roughly $0.20-$0.30 per lead, with no cap on senders.

Integrations, API, and MCP

Reply.io: native links cover HubSpot, Salesforce, Pipedrive, Copper, Zendesk, and Close, plus Zapier, Make, n8n, webhooks, an API, and MCP. A 2-star Trustpilot review said the HubSpot sync isn't natively two-way.

AiSDR: HubSpot syncs both ways on every plan, Salesforce only on Scale, and calls run through Aircall.

Agent Frank: he lives in Salesforge, which has native links to HubSpot, Salesforce, Pipedrive, Attio, GoHighLevel, folk, Breakcold, and Clay, plus Zapier, Make, and webhooks. The full integrations library and the API need Salesforge Growth, and the MCP server and Forge CLI let AI assistants run the whole stack.

Onboarding, support, and security

Reply.io: AI SDR plans come with CSM onboarding, and AI SDR Growth adds white-glove onboarding and a Slack channel. Reply's chat team targets replies in under 15 minutes between 2 AM and 7 PM EST.

AiSDR: Solo onboarding is self-serve, with email and chat support. Explore adds a dedicated GTM engineer and 24/7 Slack support, and Scale adds bi-weekly performance reviews.

Agent Frank: every account gets a dedicated Account Manager and a shared Slack channel. Your Account Manager builds his Knowledge Base with you, sets up mailboxes, and launches him once the 2-week warm-up ends. Salesforge is SOC2 compliant.

AI SDR Pricing: What 2,000 New Prospects a Month Costs

I checked every price below on each vendor's live pricing page on October 8, 2026.

Reply.io and AiSDR both charge for each new prospect you reach. Jason's price climbs in steps from 1,000 to 10,000 contacts, while AiSDR jumps from 800 contacts at $900 to 2,500 at $2,500.

Agent Frank charges for leads in progress at the same time, so 1,000 Active Contacts cover 2,000-2,500 new leads a month. Annual billing helps all three: 33-40% off Jason, 20% off AiSDR, and 2 months free on Frank.

Scenario: about 2,000 new prospects a month

• Agent Frank: $599/mo billed quarterly, plus $69/mo for 20 Megaforge mailboxes, comes to $668/mo. On annual billing, the pair costs $568/mo, or $6,816 a year.
• Reply.io: the 2,000-contact AI SDR Starter tier costs $1,200/mo monthly, or $800/mo billed annually ($9,600 a year).
• AiSDR: Explore's 800 contacts aren't enough, so you'd need AiSDR Scale at $2,500/mo on a quarterly contract, or $2,000/mo billed annually ($24,000 a year).

Billed annually, Jason costs about 1.4 times as much as Agent Frank with Megaforge for this job. AiSDR Scale costs about 3.5 times as much.

Seat math matters if your reps also send by hand. Reply's Multichannel plan costs $89/user/mo billed annually, or $445/mo for 5 reps, while Salesforge Growth costs $80/mo annually with unlimited users. The Salesforge vs Reply.io page compares the two platforms' pricing and features.

Which AI SDR Should You Choose: Agent Frank, Reply.io, or AiSDR?

Pick based on two things: how much of the work you want an AI to own, and how many new prospects you need each month. For more matchups, see Salesforge's AI SDR comparison hub and full comparison library.

You might consider Reply.io if:

• Your reps already run sequences with calls, SMS, or WhatsApp, and you want an AI SDR from the same vendor.
• You're an agency that wants an AI SDR per client, from $500/mo per client on Reply's Agency AI SDR plan.
• You sell in languages beyond Frank's 21+, since Jason lists 50+.

You might consider AiSDR if:

• You're a founder who wants to trial an AI SDR for $250/mo, cancel anytime, without a sales call.
• You live in HubSpot and want two-way sync even on the entry plan.

Choose Agent Frank if:

• You sell B2B deals worth $5K-$100K a year to startups, SMBs, or mid-market companies, and you target 3,000+ accounts.
• You want email and LinkedIn handled on Auto-Pilot or Co-Pilot, with as many senders as you like.
• You need 2,000-2,500 new leads a month for $599/mo billed quarterly, instead of $1,200-$1,500 for Jason monthly or $2,500 for AiSDR Scale.
• You want deliverability built in: free Warmforge warm-up, Heat Score™ checks, and Megaforge mailboxes across four providers.
• You want the choice of running the stack yourself, letting Agent Frank run it, or hiring a Forge Expert agency.

Final Verdict: The Best AI SDR for SMB and Mid-Market Outbound

Reply.io is a sales engagement platform with 10+ years behind it, and Jason is an extra AI SDR plan priced per new contact, from $500/mo billed annually. AiSDR is a focused AI SDR agent that costs about $1 per researched contact and limits senders on every plan.

For SMB and mid-market B2B teams that want an AI SDR running email and LinkedIn at volume, Agent Frank is the stronger choice. He covers 2,000-2,500 new leads a month for $599/mo billed quarterly or $499/mo billed annually, with unlimited senders, free Warmforge warm-up, and every reply in Primebox™.

Here's my claim, and Salesforge can be held to it. For 2,000 new prospects a month on annual billing, Frank plus Megaforge costs $568/mo, while Jason costs $800/mo and AiSDR Scale costs $2,000/mo.

The results hold up too. In the public VAI Consulting case study, Frank booked 3 calls in the first week after a pivot to a more focused ICP.

One caveat comes from Salesforge itself: if your pipeline runs on Fortune 500 accounts and long RFP cycles, it says its stack isn't built for you. Everyone else can check the 2,000-prospect math against their own volume.

Frequently Asked Questions About Agent Frank, Reply.io, and AiSDR

Is Agent Frank better than Reply.io's Jason and AiSDR?

Yes, for SMB and mid-market teams that need email and LinkedIn outreach at volume. Agent Frank covers 2,000-2,500 new leads a month for $599/mo billed quarterly or $499/mo annually, with unlimited senders and free Warmforge warm-up.

Jason costs $800-$1,200/mo for 2,000 new contacts, depending on billing, and AiSDR Scale costs $2,000-$2,500/mo for 2,500. Reply.io fits better if you need calls, SMS, and WhatsApp in the same sequences.

What's the main difference between Agent Frank, Reply.io, and AiSDR?

The main difference is what you pay for. Agent Frank bills per Active Contact, the leads he's working at once, so 1,000 of them cover 2,000-2,500 new leads a month.

Reply.io bills Jason per new contact, as a plan on top of its sales engagement platform. AiSDR bills per researched contact and limits mailboxes and LinkedIn accounts by plan.

Which is cheaper: Agent Frank, Reply.io, or AiSDR?

AiSDR has the lowest entry price at $250/mo, but that covers only 200 researched contacts. Per new lead, Agent Frank is cheapest, at roughly $0.20-$0.30 a lead on his 1,000 Active Contact plan.

For about 2,000 new prospects a month on annual billing, Frank plus 20 Megaforge mailboxes costs $568/mo. Jason costs $800/mo for 2,000 contacts, and AiSDR Scale costs $2,000/mo.

Do Reply.io and AiSDR support LinkedIn outreach?

Yes. Jason sends LinkedIn connection requests, messages, and AI voice messages, and Reply's plan comparison lists 1 LinkedIn account per team on AI SDR plans. AiSDR covers connection requests, direct messages, and InMail, with 1, 5, or 20 LinkedIn accounts by plan.

Agent Frank runs LinkedIn and email in the same sequence, with no limit on LinkedIn senders, and LinkedIn replies arrive in Primebox™.

Can I switch from Reply.io or AiSDR to Agent Frank easily?

Yes, if you plan around your current contract and the warm-up. Jason bills monthly or annually, and AiSDR's Explore and Scale plans run on quarterly contracts.

Frank's setup is a demo, a Knowledge Base build, and a 2-week Warmforge warm-up, so start about 2 weeks before your current term ends. Still deciding? Compare these Reply.io alternatives.

Which AI SDR has better email deliverability?

Agent Frank has the deepest deliverability setup of the three. Each mailbox warms for free in Warmforge's premium pool with its own Heat Score™, and Megaforge spreads sending across Gmail, Outlook, Mailforge, and Infraforge.

Reply.io includes Mailtoaster.ai warm-up and done-for-you deliverability on Jason plans. AiSDR buys and warms mailboxes for you, and says several inboxes need 30+ days to get ready.

Do Agent Frank, Reply.io, or AiSDR offer a free trial?

None of the three AI SDRs has a self-serve free trial. Agent Frank and Jason both start with a demo, and AiSDR's Solo plan is month-to-month with no free tier.

Salesforge itself offers a 14-day free trial with no credit card required. Reply.io gives 14 days free on its human-run Email Volume and Multichannel plans.

Who is Reply.io best for, and who is AiSDR best for?

Reply.io suits teams and agencies whose reps run sequences across email, LinkedIn, calls, and SMS, and who want Jason from the same vendor. AiSDR suits founders who want to try an AI SDR month to month at $250/mo.

If you need an AI SDR reaching 2,000+ new leads a month, look at Agent Frank or these AiSDR alternatives.