Instantly is a cold emailing platform designed to automate the entire email prospecting process at scale: finding prospects, sending personalized sequences from several accounts simultaneously, and managing replies from a single dashboard. In just a few years, the tool has established itself as one of the global benchmarks in the sector, particularly for sales teams, growth agencies and founders who run their own outbound.
This guide is intended for both those who are discovering Instantly for the first time and users who want to take their use of the tool further. Here you’ll find an honest overview of what the tool does well, its real limitations, pricing, key features, and the alternatives available on Freelance Stack if Instantly isn’t the right fit for you.
Cold email prospecting rests on two major challenges: sending enough messages to generate opportunities, and making sure those messages land in the main inbox, not in spam. Instantly built its product around these two constraints precisely.
The basic principle is easy to understand but difficult to implement without a dedicated tool. When you send several hundred emails from a single Gmail or Outlook account, the providers’ algorithms eventually flag the sender as suspicious. The domain’s reputation suffers, emails stop getting through, and campaigns fall flat. Instantly solves this problem by allowing you to connect an unlimited number of sending accounts, rotate them automatically, and gradually “warm them up” through a private network of over 4.2 million accounts.
For a freelancer or startup looking to land its first enterprise clients, for an agency managing multiple client campaigns simultaneously, or for a solo sales rep prospecting without an SDR team, this architecture is a real game-changer.
| Criterion | Instantly | Lemlist | Smartlead |
|---|---|---|---|
| Sending accounts | Unlimited on all plans | Limited depending on the plan | Unlimited on all plans |
| Automatic warmup | ✅ Included | ✅ Included | ✅ Included |
| Prospect database | 450M+ B2B contacts | Not included | Not included |
| Multichannel (LinkedIn, SMS) | ❌ Email only | ✅ Email + LinkedIn | ❌ Email only |
| Admission price | ~ $30/month | 39$/user/month | ~ $39/month |
| Integrated CRM | ✅ Optional module | Limited | Limited |
Instantly’s main strength against Lemlist is price. Where Lemlist charges per user, Instantly offers a flat subscription that covers a whole team. Against Smartlead, Instantly stands out with its built-in B2B database (SuperSearch), which avoids paying separately for a sourcing tool such as Apollo or Hunter.
Instantly’s pricing is organized into several independent modules: Outreach (sending and warmup), Leads (database + credits), and CRM. Each module is subscribed to separately, which makes the pricing a little confusing at first glance.
| Plan | Monthly price | Active contacts | Emails/month | What changes |
|---|---|---|---|---|
| Growth | ~ $30/month | 1 000 | 5 000 | Basic access, unlimited warmup, unlimited accounts |
| Hypergrowth | ~ $77/month | 25 000 | 100 000+ | A/B testing, API, Webhooks, Slack, Unibox |
| Light Speed | ~ $286/month | Unlimited | Unlimited | Private IPs (SISR system), enterprise volume |
The Growth plan suits independent professionals and founders who are starting out with outbound prospecting. The limit of 1,000 active contacts is restrictive if you run several campaigns at the same time, but for targeted, well-built prospecting it is more than enough. The Hypergrowth plan is the “sweet spot” for teams managing several clients or several segments in parallel.
Important note: The Growth plan does not include access to Slack or webhooks. If your sales stack relies on real-time Slack notifications or advanced Zapier integrations, you’ll need to upgrade to the Hypergrowth plan.
SuperSearch provides access to over 450 million verified B2B contacts. Contacts can be filtered by job title, industry, company size, location, technology stack, and funding level. A credit system covers verified email addresses (1 credit per email via the Instantly network, 2+ credits via external partners) and automated responses via the AI Reply Agent (5 credits per response).
One notable drawback for teams that primarily prospect in France: SuperSearch’s coverage of the French market is more limited than its coverage of the U.S. market. If your prospecting targets French companies, you’ll find that the database is less extensive than expected, with approximately 160,000 French contacts listed. For international prospecting or prospecting focused on the U.S. market, however, it’s very robust.
Instantly offers a 14-day free trial with no credit card required, which is enough to test the whole flow: campaign creation, warmup, sending and reading the statistics.
The interface is intentionally minimalist, similar in style to Notion. The main navigation bar features four main sections: Outreach (your campaigns), Leads (your prospect database), CRM (the sales pipeline), and Analytics. The onboarding process provides step-by-step guidance for connecting your first email account, which takes less than ten minutes for Gmail or Google Workspace.
This is the first step, and often the most decisive one. Instantly recommends not exceeding 30 emails per inbox per day to preserve domain reputation. In other words, if you want to send 300 emails a day, you will need 10 connected accounts. This multi-account model is at the heart of the tool’s philosophy.
The warmup starts automatically as soon as an account is connected. Instantly automatically sends and receives emails between the accounts in its network, which simulates normal activity and gradually builds the sender’s reputation with Google or Microsoft.
The campaign builder is sequential: you enter a name, import your list of prospects (CSV, Google Sheets, or from SuperSearch), draft your email sequence, and configure the sending rules (time between follow-ups, time window, days to send). AI can generate a complete sequence in just a few seconds based on a description of your target audience and your value proposition.
An overview of the features that make a difference day to day: the ones you’ll use from the very first weeks and the ones that become indispensable as your volumes grow.
This is the feature that has made Instantly famous. Unlike tools that charge for each additional inbox, Instantly does not limit the number of connected accounts. The system automatically rotates between accounts: it intelligently distributes outgoing emails to avoid overloading a single sender and to protect the domains.
The sequence builder lets you create multi-step journeys where each follow-up is based on the prospect’s behavior: Did they open the email? Did they click? Did they reply? Based on these signals, the tool automatically adapts the rest of the sequence. A/B testing (available starting with the Hypergrowth plan) lets you test multiple versions of a subject line or email body to identify which one performs best.
When you manage 15 or 20 sending accounts in parallel, handling replies quickly becomes a headache. The Unibox centralizes every reply in a single interface, whichever account sent the original email. It is one of the features most appreciated by users who handle large volumes.
The AI Reply Agent can automatically handle initial responses: it analyzes the content of the prospect’s response and generates a tailored reply based on the configured context (information about your company, your offering, your ICP). Each generated response uses 5 credits. This saves time for teams that receive a large volume of responses and do not want to process them all manually.
The integrated B2B database allows you to source leads directly within the tool, without going through an external provider. Natural-language search is fully functional: you can type “Sales Directors at French SaaS startups with 20 to 100 employees” and get a filtered list. Data enrichment also allows you to supplement existing files with missing information (email, job title, company).
The deliverability dashboard displays a health score per account, the rate of delivery to the main inbox vs spam, and alerts if a domain is blacklisted. On the Light Speed plan, the SISR (Server & IP Sharding and Rotation) system automatically assigns dedicated IP pools and immediately replaces flagged IPs, with no manual intervention.
Here are four real-world scenarios in which Instantly provides real added value, depending on your context and your level of maturity in outbound prospecting.
A solo consultant does not have time to prospect manually all day. With Instantly, they can set up a targeted campaign of 200 to 300 prospects a month across 3 to 5 sending accounts, with a sequence of 4 to 5 follow-ups spread over 3 weeks. Account warmup runs in the background, follow-ups go out automatically based on behavior, and the Unibox lets them handle replies in 30 minutes a day instead of juggling several inboxes. A reply rate of 5 to 15% on a well-targeted list means 10 to 45 replies a month, a far from negligible source of qualified leads.
For an agency that runs outbound campaigns for 5 to 10 different clients, Instantly offers an architecture designed specifically for this use case. Each client has its own domains and sending accounts, all managed from a single Instantly account. The Unibox separates responses by campaign, and the analytics allow you to generate clear reports for each client. The Hypergrowth plan, which costs between $77 and $97 per month depending on the configuration, remains significantly more cost-effective than a per-user solution like Lemlist.
In the early months of a startup, outbound prospecting is often used to validate market assumptions: Does this message resonate with this type of decision-maker? Instantly lets you run A/B campaigns on different segments, measure open, click-through, and response rates by variant, and iterate quickly. The AI-powered sequence generator reduces the time spent on drafting, and real-time analytics provide quick feedback on what’s working.
A field sales rep who prospects without the support of a dedicated team can use Instantly to automate the upstream part of the sales cycle. The campaign runs while they are in meetings, follow-ups go out automatically, and in the Unibox they find only the prospects who replied positively. The time spent on pure prospecting can therefore drop from several hours a day to less than an hour.
The basic rule recommended by Instantly is never to exceed 30 emails per inbox per day. A simple calculation is therefore needed before launching a campaign: if you have 10 connected inboxes and you send 25 emails per day per inbox, you can reach 250 emails a day, around 5,000 emails a month. To scale up the volume, you add inboxes, you do not raise the quota per inbox.
Ideally, a newly purchased domain should be warmed up for 3 to 4 weeks before being used in production. Instantly can manage this process in the background. During this period, you send 5 to 10 emails a day through the automatic warmup, with no active campaign on that domain. This patience pays off over time: properly warmed-up domains have significantly better main-inbox delivery rates.
Instantly supporte le Spin Syntax, une technique qui consiste à insérer des variations de texte dans un même template pour que chaque email envoyé soit légèrement différent. Exemple : {Bonjour|Salut|Hello} {Prénom} génère trois formulations différentes aléatoirement. Sur de gros volumes, cela réduit la "signature" répétitive que les algorithmes de détection de spam identifient comme suspecte.
Available starting with the Hypergrowth plan, the API and webhooks let you automate actions triggered by Instantly events. For example: when a prospect responds positively, an automation can automatically create a deal in your external CRM (HubSpot, Pipedrive, Salesforce), send a Slack notification to the sales team, and schedule a follow-up task. These workflows are easy to build using PhantomBuster or Make.
Instantly integrates natively with the main tools in the sales stack: Zapier, HubSpot, Pipedrive, Salesforce, Slack, Discord, and Google Sheets for importing and exporting lists. The open API allows for more customized integrations for technical teams.
A particularly interesting integration: the Website Visitors module, which identifies anonymous visitors to your site and adds them directly to an Instantly campaign. If a prospect visits your Pricing or Product page without converting, they can automatically be added to a cold email sequence targeted to that behavior.
On Freelance Stack, several tools connect naturally to Instantly to build a complete prospecting stack:
Hunter and DropContact to enrich and validate your email lists before importing them. Kaspr or Lusha to source LinkedIn contacts before pushing them into Instantly. Clay to build highly targeted lists using waterfall enrichment from multiple sources simultaneously. Waalaxy as a supplement if you want to add a LinkedIn dimension to your prospecting, since Instantly only covers email.
Being honest about a tool’s weaknesses is probably the most useful section of this guide. Here are the issues that come up regularly in feedback from real users.
Instantly offers no LinkedIn automation, no SMS and no call sequences. If your prospecting strategy relies on a mix of email, LinkedIn and phone follow-up, you will have to pair Instantly with another tool. Waalaxy or Lemlist cover this multichannel need natively.
The $30/month plan makes a nice marketing argument, but as soon as you try to use Instantly as a complete solution (sending + database + CRM), the bill quickly climbs to between $150 and $400/month depending on volumes. It is important to factor this in from the start rather than discovering it at renewal time.
As mentioned above, the database’s coverage of the French market is still incomplete. When it comes to B2B prospecting in France, users report mixed results, particularly with regard to French SMEs and microbusinesses. Teams that primarily target the U.S. market or English-speaking markets fare much better with SuperSearch.
The integrated CRM is designed to manage responses to cold email campaigns, not to manage an entire sales cycle. If you need a full-fledged CRM with opportunity tracking, forecasting, contract management, and advanced sales reporting, you’ll need a dedicated tool connected via API.
Who is this not suitable for?
Instantly isn’t designed for someone who wants to manage the entire customer relationship using a single tool. Nor is it the right choice for highly targeted prospecting campaigns with fewer than 50 contacts per month, where automation doesn’t offer much advantage over personalized manual work. Finally, for teams that need native LinkedIn tracking, other tools will be more suitable.
| Profile | Recommended alternative | Why |
|---|---|---|
| You want multichannel (email + LinkedIn) | Waalaxy or Lemlist | Email + LinkedIn sequences natively |
| You prospect mainly via LinkedIn | Kaspr or PhantomBuster | LinkedIn extraction and enrichment |
| You want an email marketing tool (not cold) | Brevo or Mailchimp | Designed for newsletters and marketing campaigns |
| You want to enrich your lists before import | DropContact or Hunter | B2B email verification and enrichment |
| You want a highly targeted source of leads | Apollo or Clay | Rich B2B databases with intent signals |
| You want volume and better deliverability | Smartlead | Advanced IP rotation, enterprise volume |
The most common questions people ask before getting started on Instantly, with straightforward answers to help you make an informed decision.
No, Instantly does not offer a permanent free plan. However, a 14-day free trial is available without a credit card, which gives you plenty of time to test the main features, connect your email accounts, and launch your first campaign.
It depends on the number of connected sending accounts and the plan you’ve subscribed to. The Growth plan limits you to 5,000 emails per month with 1,000 active contacts at any given time. The Hypergrowth plan increases this to 100,000 emails per month with 25,000 active contacts. In any case, we recommend not sending more than 30 emails per inbox per day.
Partially. The tool itself works very well in French and for French targets. However, the SuperSearch database doesn’t cover the French market as well as it does the U.S. market. If you source your leads using tools like DropContact or Kaspr and then import them into Instantly, the tool meets your needs perfectly.
These are two fundamentally different uses. Instantly is designed for B2B cold emailing: sending emails to people who don’t know you yet, with the goal of scheduling a meeting or getting a response. Brevo and Mailchimp are email marketing tools designed to send newsletters or promotional campaigns to a contact list that has consented to receive your communications. Both are subject to different regulations (GDPR, CAN-SPAM) and use distinct technical infrastructures.
Yes. Starting with the Hypergrowth plan, Instantly lets you invite team members. Multiple people can access the same account, manage campaigns, and view analytics from the shared Unibox. This is especially useful for agencies or sales teams.
This is one of the inherent risks of cold emailing, whatever tool is used. Instantly puts mechanisms in place to reduce that risk (automatic warmup, account rotation, deliverability monitoring), but results vary with list quality, content relevance, domain configuration (SPF, DKIM, DMARC) and recipient behavior. User feedback reports that the health scores shown in the dashboard do not always perfectly reflect actual deliverability.
Yes, Instantly offers native integrations with HubSpot, Pipedrive, and Salesforce, as well as with Zapier and webhooks for more customized connections. These integrations are available starting with the Hypergrowth plan.
Apollo is first and foremost a B2B database with built-in outreach features. Instantly is first and foremost a sending platform with a database on the side. In practice, Apollo is often more relevant for sourcing and qualifying leads, while Instantly excels at sending large volumes from multiple accounts with better control over deliverability. Both tools are available on Freelance Stack: Apollo and Instantly.
Instantly has built a solid reputation for one simple reason: it effectively solves the volume problem in cold emailing. The combination of unlimited accounts, automatic warmup and conditional sequences works, and the interface stays accessible even for teams new to outbound prospecting.
This tool is particularly well-suited for agencies, growing startups, and salespeople who want to automate their email outreach on a large scale. For teams that work primarily in France or that need native multichannel capabilities, they’ll need to add another tool to their stack.
