NuReply
AI cold email with unlimited warmup, now run by a deliverability company
NuReply is a cold email outreach platform with AI personalization built in: it connects your own Google Workspace, Microsoft 365, or SMTP mailboxes, warms them up without an extra charge, generates personalized first lines and emails from public prospect data, and runs multi-step sequences with conditional follow-ups; it was acquired by the email infrastructure company DuoCircle and is sold in six self-serve tiers from $25 a month, with the AI metered separately from the sending volume.
Overview
NuReply sits on the other side of this category from the personalization utilities. Where Lyne, SmartWriter, and Warmer hand you a column of text and leave sending to somebody else, NuReply is a sending platform first, with AI personalization layered on top. That makes it a direct competitor to Instantly, Smartlead, and Lemlist rather than to the copy tools, and it means the thing you are buying is infrastructure: mailbox connections, warmup, sequence logic, and inbox placement.
The most consequential fact about NuReply is one the pricing page does not mention. It was acquired by DuoCircle LLC, the email infrastructure company founded by Brad Slavin, whose other products include DuoCircle's email security suite, AutoSPF for SPF record management, and DmarcReport for DMARC monitoring. That lineage is unusual and useful. Most cold email vendors treat deliverability as a feature they bolt on; DuoCircle's entire business is email plumbing, and NuReply is now positioned inside that portfolio as the outreach front end. The vendor's support site confirms the platform remains fully operational post-acquisition.
The architecture is bring your own mailbox. You connect Gmail, Outlook, or arbitrary SMTP accounts, and the plan tier governs how many. The numbers are generous to the point of being startling: the $25 Starter tier allows 50 email accounts, 10,000 contacts, and 30,000 emails a month, and the top Enterprise tier at $400 allows 1,500 accounts and a million monthly sends. Warmup is unlimited on every tier rather than being sold as a per-mailbox add-on, which is the single biggest cost difference against competitors who charge separately for it.
Watch the AI meter, because it is where the plan boundaries actually bite. Starter includes 500 AI credits, Growth 3,000, Enterprise 9,000, and those are far smaller numbers than the contact and send allowances sitting next to them. In practice you are buying a big sending platform with a comparatively small allowance of AI personalization, and if your intent is to personalize every contact you will hit the credit ceiling long before the send ceiling. The fourteen day trial with 300 AI credits and no card required is the right way to find out where your own ratio lands.
Best for
Small businesses and agencies that want one self-serve tool covering mailbox management, unlimited warmup, sequencing, and AI personalization at a low monthly price, and who are comfortable buying and configuring their own domains and inboxes.
Not the right fit for
- Anyone who wants an autonomous agent: NuReply sends and personalizes, but qualification, reply handling, objection management, and meeting booking are all human work.
- Teams that intend to AI-personalize every contact at volume, who will exhaust the comparatively small AI credit allowance long before the generous send allowance and end up upgrading for credits they do not otherwise need.
- Buyers who want infrastructure bundled: domains and mailboxes are not included on any tier, so the advertised price is meaningfully below the true monthly cost.
- Organizations requiring enterprise procurement artifacts; the published compliance posture is thin and the tier labelled Enterprise at $400 is a volume tier, not a governance tier.
- Anyone uncomfortable buying from a platform that changed ownership; the acquisition by DuoCircle is a positive on deliverability expertise but it is still a roadmap discontinuity worth acknowledging.
How it works
- 1
You connect your own sending accounts. NuReply does not sell you domains or mailboxes, so the first real task is buying secondary domains and provisioning inboxes on Google Workspace, Microsoft 365, or any SMTP provider. That cost is yours and it is the part beginners underestimate.
- 2
Warmup starts immediately and runs unlimited on every plan. NuReply builds sender reputation through gradual automated activity before real volume goes out, which is why the first two to four weeks of any new domain should be treated as setup rather than as campaign results.
- 3
You load contacts and NuReply's AI reads each prospect's role, company, and available public information to write a genuinely individual email rather than filling a merge field. This step consumes AI credits, which are metered separately and much more tightly than sends, so most teams personalize a subset rather than the whole list.
- 4
Sequences run multi-step with conditional logic, delays, and triggers, and replies land back in your own connected mailboxes. There is no autonomous agent watching the inbox and no AI reply drafting worth relying on: a human reads and answers. The platform's job ends at getting a well-personalized message into an inbox that will accept it.
Feature breakdown
24 features in 5 modulesSending infrastructure
The half of outbound that the copy tools in this category refuse to touch.- Bring your own mailbox
- Connect Google Workspace, Microsoft 365, or arbitrary SMTP accounts. You own the sending identity and can leave without losing it, unlike vendors who provision mailboxes on your behalf.
- High mailbox allowances
- From 50 connected accounts on the $25 Starter tier up to 1,500 on Enterprise, which is far more headroom per dollar than most competitors publish.
- Unlimited warmup on every tier
- Sender reputation building is included rather than charged per mailbox, which is the single largest cost difference against platforms that meter warmup separately.
- Automated reputation building
- Gradual send ramping and warmup activity run continuously in the background rather than as a one-time setup step.
- Large monthly send allowances
- 30,000 emails a month at the entry tier scaling to a million at the top, which decouples the price from ordinary volume growth.
- Contact ceilings per tier
- From 10,000 contacts on Starter to 250,000 on Enterprise, so the database size rather than the send count is often the real constraint.
AI personalization
Real, useful, and metered far more tightly than everything around it.- Per-prospect email generation
- The AI reads each prospect's role, company, and public information to produce an individual email rather than a template with merge fields, which is the difference the vendor leads with.
- AI credits as a separate meter
- 500 credits on Starter, 1,200 on Launch, 3,000 on Growth, 5,000 on Scale, 7,000 on Pro, and 9,000 on Enterprise. This ceiling, not the send ceiling, determines what plan you actually need.
- Cold email writer
- Generation is available as a distinct workflow rather than only inside a campaign, so copy can be produced and reviewed before it is scheduled.
- Personalization from public data
- Role, company, and publicly available signals feed the generation, with the same footprint dependency every tool in this category has: sparse prospects yield generic output.
Campaigns and sequencing
Standard multi-step outbound mechanics, without artificial caps.- Unlimited sequences
- No cap on how many campaigns you run, on any tier, which matters for agencies juggling separate motions per client.
- Conditional logic
- Branch follow-ups on prospect behaviour rather than sending the same three-touch sequence to everyone.
- Delays and triggers
- Timing controls between steps, which is the crude but effective lever most teams use to keep sending human-paced.
- Smart follow-ups
- Automated follow-up steps that stop when a prospect replies, the baseline expectation for any sequencer.
- Replies to your own inbox
- Because sending runs through your connected accounts, responses land where you already work rather than in a proprietary inbox you have to check separately.
Integrations and platform
Enough plumbing for a small stack, with API access gated by tier.- HubSpot integration
- The one native CRM connection, which covers the CRM most small B2B companies actually run.
- Zapier
- Covers everything outside the native connector list, which is the pragmatic answer for a platform with a short integration menu.
- REST API from the Growth tier
- Programmatic access starts at $100 a month rather than being available at entry level, so plan for that if you intend to script anything.
- Gmail, Outlook, and generic SMTP
- Provider-agnostic mailbox connection rather than a supported-vendors list, which keeps cheap SMTP options open.
Commercial and ownership
How buying works and who you are actually buying from.- Fourteen day trial with 300 AI credits
- No credit card required, and enough credits to judge personalization quality on a real list before paying anything.
- Six published self-serve tiers
- From $25 to $400 a month with no demo gate at any level, which is unusually granular and lets a business step up in small increments.
- Roughly a third off annual billing
- Annual prices such as $199 against $25 monthly work out to around a 34 percent discount, steeper than the category norm.
- Owned by DuoCircle
- NuReply was acquired by DuoCircle LLC, founded by Brad Slavin, whose portfolio includes DuoCircle email security, AutoSPF, and DmarcReport. Deliverability expertise is the parent company's core business rather than a bolt-on.
- Support tiers scale with plan
- Email support at the bottom, progressing to dedicated account management at Enterprise, with the vendor advertising 24/7 availability.
Use cases
4 documentedAgency running outbound for several clients
Each client needs its own domains, mailboxes, warmup, and sequences, and per-mailbox warmup charges at other vendors make the maths hostile.
One $100 Growth plan covers 250 connected accounts with unlimited warmup and unlimited sequences, so mailbox count stops being a per-client cost and the constraint moves to AI credits and account management time.
Small business replacing a bundle of separate tools
The current stack is a sequencer, a separate warmup vendor, and a personalization tool, adding up to more than $150 a month across three invoices.
A single $50 Launch plan covers sending, warmup, and a modest AI credit allowance, consolidating three renewals into one and removing the warmup line item entirely.
Founder starting outbound from nothing
No domains, no sending accounts, no idea what warmup is, and a strong urge to buy a $250 a month agent that promises to handle everything.
The $25 tier plus two secondary domains and a handful of mailboxes gets a real motion running for well under a hundred dollars all in, with the trial's 300 AI credits used first to check whether the personalization is worth paying for.
Team that personalizes selectively
Only the top few hundred accounts justify individually written emails; the long tail can run on a good template.
The mismatch between huge send allowances and small AI credit pools stops being a problem, because the credits are spent exactly where they earn their keep and the rest of the list runs on templated sequences.
Pricing
from $25 per month (Starter), or $199 per yearSix self-serve monthly tiers, each defined by connected email accounts, AI credits, contacts stored, and monthly sends, with a substantial annual discount.
| Plan | Price | Includes |
|---|---|---|
| Starter | $25 per month, or $199 per year |
Genuinely usable rather than a sampler; the AI credit pool is the only tight constraint. |
| Launch | $50 per month, or $399 per year |
|
| Growth | $100 per month, or $999 per year |
The first tier with API access, which matters if you intend to script anything at all. |
| Scale | $200 per month, or $1,999 per year |
|
| Pro | $300 per month, or $2,399 per year |
|
| Enterprise | $400 per month, or $3,999 per year |
A volume tier rather than a governance tier; it buys capacity, not SSO or compliance guarantees. |
Billing notes
- Annual billing saves roughly a third against monthly, a steeper discount than most competitors offer, which also means a bigger commitment to a platform that recently changed hands.
- Domains and mailboxes are not included at any tier. Realistically add $20 to $60 a month for secondary domains and inbox licences before the platform does anything useful.
- The AI credit allowance is the meter that binds. Starter gives 500 credits against 30,000 monthly sends, so personalizing everything is arithmetically impossible at the entry tier.
- API access starts at the $100 Growth tier, so any automation plan should assume that price floor rather than the $25 one.
- Warmup is unlimited on every tier and not sold as an add-on, which removes a line item that competitors typically charge per mailbox for.
Value assessment: On sending infrastructure per dollar, NuReply is among the most aggressive offers in the market: 50 connected mailboxes with unlimited warmup for $25 a month is a number that would be a mid-tier plan elsewhere. The catch is the deliberate asymmetry between the huge send allowances and the small AI credit pools, which is where the upgrade pressure is engineered. Price the plan you need on credits, not on sends, and add domains and mailboxes to whatever the page says. Judged that way it is still good value, particularly for agencies, and the DuoCircle ownership is a genuine argument that the deliverability side is taken seriously by people who do this for a living.
Strengths & limitations
Strengths
- Unlimited warmup on every tier removes the cost line that quietly doubles the price of most cold email stacks.
- Mailbox and send allowances are unusually generous per dollar, with 50 connected accounts at the $25 entry tier.
- Bring your own mailbox architecture means you keep your sending identity and can leave without losing your domains.
- Owned by DuoCircle, an email infrastructure company whose other products cover SPF and DMARC management, so deliverability expertise is core rather than decorative.
- Six granular self-serve tiers with no demo gate anywhere, letting a business scale in $25 to $100 increments rather than jumping between two extremes.
- A fourteen day trial with 300 AI credits and no card requirement makes the personalization quality testable before any commitment.
- Unlimited sequences on all tiers, which is the right structure for agencies running separate motions per client.
Limitations
- AI credits are metered far more tightly than sends, so the headline allowances overstate what you can actually personalize at your plan level.
- No domains or mailboxes are included, so the advertised price is materially below the true cost of running outbound.
- It is not an autonomous agent: no reply qualification, no objection handling, no meeting booking, and no AI inbox management worth relying on.
- The integration list is short, with HubSpot as the only native CRM and Zapier covering everything else.
- API access is gated to the $100 tier and above, which is high for a platform whose entry point is $25.
- Public review volume is thin, with only a handful of ratings, so there is far less independent evidence about real-world results than for Instantly or Smartlead.
- The change of ownership to DuoCircle, while plausibly positive, is a roadmap discontinuity and worth weighing before committing to an annual plan.
Head-to-head comparisons
5 alternativesNuReply vs SmartWriter.ai
from $49 per month for 400 leadsOpposite halves of the same job. SmartWriter researches and writes but never sends; NuReply sends, warms up, and sequences with a comparatively small AI allowance on top. If your bottleneck is copy quality, SmartWriter's research is deeper. If your bottleneck is infrastructure and inbox placement, NuReply is the one that solves it, and some teams reasonably run both.
Full NuReply vs SmartWriter.ai comparisonNuReply vs Instantly
from $37/moThe most direct comparison. Instantly is the category incumbent with a much larger user base, a lead database, and far more independent evidence about results, but warmup and higher mailbox counts push the effective price up. NuReply undercuts it sharply on mailbox allowance and includes unlimited warmup at $25. Choose Instantly for maturity and ecosystem, NuReply for capacity per dollar and a lower floor.
Full NuReply vs Instantly comparisonNuReply vs Smartlead
from $39/moSmartlead competes on the same axis of mailbox volume and deliverability and has a deeper reputation among agencies, with a more developed unibox and analytics layer. NuReply matches it on the bring-your-own-mailbox model and unlimited warmup while being newer, cheaper at the entry point, and much less battle-tested. If you run client outbound for a living, Smartlead has the track record; if you are cost-sensitive and willing to be an earlier adopter, NuReply is the value play.
Full NuReply vs Smartlead comparisonNuReply vs lemlist
from $39/user/moLemlist is the more polished product with stronger multichannel support, a built-in lead database, and better-known personalization features such as dynamic images, priced per seat rather than per mailbox. NuReply is cheaper, allows vastly more connected accounts, and includes warmup, but is plainer and less proven. Take Lemlist for craft and multichannel, NuReply for volume economics.
Full NuReply vs lemlist comparisonNuReply vs Salesforge
from $40 per month (Pro), with Agent Frank from $499 per monthSalesforge is a closer fit to the AI SDR framing, bundling AI sequence generation, mailbox provisioning through its own infrastructure product, and multichannel execution as a managed motion. NuReply expects you to buy and manage your own domains and mailboxes and stops at sending. If you want infrastructure handed to you, Salesforge; if you want the cheapest capable platform you control end to end, NuReply.
Full NuReply vs Salesforge comparisonImplementation & onboarding
- Setup time
- A day of work spread over two to four weeks of waiting. Connecting the platform takes an hour, but buying secondary domains, provisioning mailboxes, configuring SPF, DKIM, and DMARC, and letting warmup run properly is what actually gates your first real campaign.
- Learning curve
- Moderate, and mostly about email rather than about NuReply. The interface is straightforward; the hard part is understanding domain reputation, send pacing, and why your first month should be judged as setup rather than as results.
- Onboarding
- Fully self-serve on all six tiers, with a fourteen day trial including 300 AI credits and no card required. Support scales from email at the bottom to dedicated account management at Enterprise, with the vendor advertising round-the-clock availability.
- Migration notes
- Because sending runs through your own Google Workspace, Microsoft 365, or SMTP accounts, migrating in or out does not involve moving mailboxes or losing sender reputation, which is a significant advantage over vendors who provision inboxes for you. Contacts and sequences move by export and import. The main friction of leaving is the annual prepayment if you took the roughly one third discount.
Platform, API & security
- Platforms
- Web application
- API
- REST API available from the Growth tier at $100 a month and above; Zapier covers automation needs below that.
- Compliance
- No published SOC 2 or ISO certification on the product siteGDPR obligations rest largely on the sender under a bring-your-own-mailbox model
- Data residency
- Not disclosed; no regional hosting options advertised.
- SSO
- Not advertised.
- Security notes
- Bring your own mailbox means sending credentials are connected via OAuth or SMTP and the sending identity remains yours throughout. The parent company, DuoCircle, operates email security and authentication products including SPF and DMARC tooling, which is a reasonable signal on infrastructure competence even though NuReply itself publishes no formal certification.
Support & resources
- Channels
- Email supportPriority support on higher tiersDedicated account management at EnterpriseVendor advertises 24/7 availability
- Documentation
- A support knowledge base at support.nureply.com covering setup, campaigns, and the DuoCircle acquisition, plus an active blog on cold email practice.
- Community
- No large official user community; independent review volume is low compared with the category's larger platforms.
Company
- Founded
- 2022
- Headquarters
- United States, operating under DuoCircle LLC
- Ownership
- Acquired by and operated under DuoCircle LLC, founded by Brad Slavin
- Employees
- Not disclosed; operates as a product line within DuoCircle
- Funding
- No publicly disclosed venture funding; the product was acquired by DuoCircle LLC, an established email infrastructure company whose portfolio includes DuoCircle email security, AutoSPF, and DmarcReport.
Timeline
- 2022Launches as an AI cold email tool built around per-prospect email generation rather than merge-field templates, with early distribution through lifetime deal marketplaces.
- 2023Adds unlimited warmup across all tiers and expands connected mailbox allowances well beyond category norms.
- 2024Acquired by DuoCircle LLC, the email infrastructure company founded by Brad Slavin, and repositioned as DuoCircle's cold outreach front end.
- 2025Confirms continued operation under new ownership and consolidates around a bring-your-own-mailbox architecture supporting Google Workspace, Microsoft 365, and generic SMTP.
- 2026Sells six self-serve tiers from $25 to $400 a month, with AI credits metered separately from send volume and unlimited warmup on every plan.
Integrations
- Google Workspace and Gmail
- Microsoft 365 and Outlook
- Generic SMTP providers
- HubSpot
- Zapier
- REST API from the Growth tier
Frequently asked questions
10 questionsWhat is NuReply?
NuReply is a cold email outreach platform with AI personalization built in. You connect your own Google Workspace, Microsoft 365, or SMTP mailboxes, NuReply warms them up, generates individually personalized emails from public prospect data, and runs multi-step sequences with conditional follow-ups. It is a sending platform, not a copy generator you paste into something else.
How much does NuReply cost?
Six self-serve tiers: $25, $50, $100, $200, $300, and $400 a month, with annual billing saving roughly a third. The entry $25 Starter tier includes 50 connected email accounts, 500 AI credits, 10,000 contacts, and 30,000 monthly emails. A fourteen day trial with 300 AI credits requires no credit card.
Who owns NuReply?
It was acquired by DuoCircle LLC, an email infrastructure company founded by Brad Slavin whose other products include DuoCircle email security, AutoSPF for SPF record management, and DmarcReport for DMARC monitoring. The vendor's support site confirms the platform remains fully operational under that ownership, and the deliverability expertise in the parent company is a genuine point in its favour.
Are mailboxes and domains included?
No. NuReply uses a bring-your-own-mailbox model, so you buy the secondary domains and provision the inboxes yourself on Google Workspace, Microsoft 365, or an SMTP provider. Budget roughly $20 to $60 a month on top of the subscription. The upside is that you own the sending identity and keep it if you leave.
What is the catch with the AI credits?
This is the plan boundary that actually matters. The Starter tier gives 500 AI credits against a 30,000 email monthly allowance, so personalizing every message is arithmetically impossible at that level. Choose your plan by credits rather than by sends, or plan to personalize a high-value subset and run templated sequences for the long tail.
Is warmup really unlimited?
Yes, on every tier, and it is not sold as a per-mailbox add-on. That is the single biggest structural cost advantage against competitors who charge separately for warmup, and with 50 connected accounts allowed at $25 it is the reason the entry pricing looks as aggressive as it does.
Does NuReply handle replies for me?
No. Replies land in your own connected mailboxes and a human reads them. There is no AI reply qualification, no objection handling, and no meeting booking. If you want an agent that manages the conversation after the first touch, look at AiSDR or Salesforge and expect to pay several times more.
How does NuReply compare to Instantly or Smartlead?
Same architecture, different maturity. Instantly and Smartlead have far larger user bases, more independent evidence about real results, and deeper analytics and unibox tooling. NuReply undercuts both on mailbox allowance per dollar and bundles unlimited warmup at a $25 floor. Take the incumbents for proven track record, NuReply for capacity economics if you can tolerate being an earlier adopter.
How long before campaigns produce results?
Plan for two to four weeks of warmup on new domains before real volume goes out, and judge results in the second month rather than the first. Any vendor in this category whose first-month numbers look impressive is either sending on aged domains or sending too hard on new ones.
Does it replace an SDR?
No. It replaces a sequencer, a warmup vendor, and part of a copywriter. An SDR at market salary owns targeting, qualification, conversation, and booking, and NuReply does none of those after the first message lands. What it does is make one person's outbound infrastructure cost around $75 a month all in rather than several hundred across three vendors.
Editorial verdict
NuReply is the value option among bring-your-own-mailbox cold email platforms, and the DuoCircle acquisition is the most interesting thing about it: the parent company's day job is SPF, DMARC, and email security, which is exactly the expertise this product needs. Fifty connected mailboxes with unlimited warmup for $25 a month is a genuinely aggressive offer, and the six granular self-serve tiers let a small business grow without a sales call. Buy it on credits rather than on sends, because the AI allowance is deliberately much tighter than the send allowance and that is where the upgrade pressure lives. Add domains and mailboxes to the sticker price, expect the first month to be warmup, and do not expect an agent: replies land in your inbox and a human answers them. If you want the most proven platform, Instantly and Smartlead have far more independent evidence behind them. If you want the most capacity per dollar with deliverability people behind the wheel, this is a defensible pick.
Written by the SaaSTracker editorial team. Awards, when shown, are judged against the published criteria in our methodology.