Guide
Best Cold Email And Outreach Tools for Agencies (2026)
By Red Kite Search Agency Created Updated 9 min read
Summary
Apollo.io is the best prospecting platform; Instantly is the best for high-volume cold email; lemlist is the best multichannel outreach; Hunter is the best low-cost email finder. Prices and ratings were checked in October 2026 and change often.
What are the best cold email and outreach tools for agencies in 2026?
Outbound is a core service for many agencies and a growth channel for their own pipeline. The tools split into data sources, sending platforms, and combinations of the two, and they charge in very different ways.
We compared four tools agencies evaluate most often. The right choice depends on whether you need data, volume, multiple channels, or all three, and on how much deliverability risk you can manage.
Our shortlist, in order: Apollo.io, Instantly, lemlist, Hunter. The table puts them side by side.
| Tool | Best for | Editorial score | Review-site ratings | Pricing |
|---|---|---|---|---|
| Apollo.io | Best prospecting platform | 4.4 / 5 | G2 4.7 | Free plan. Basic $49, Professional $79 and Organization $119 per user per month, billed annually; Organization has a three-seat minimum. |
| Instantly | Best for high-volume cold email | 4.4 / 5 | G2 4.8 | Growth $47, Hypergrowth $97 and Light Speed $358 a month on monthly billing, with lower annual prices. |
| lemlist | Best multichannel outreach | 4.3 / 5 | G2 4.6 | Free trial. Email $55 and Multichannel $87 per user per month on annual billing ($69 and $109 monthly); Enterprise is custom. |
| Hunter | Best low-cost email finder | 4.1 / 5 | G2 4.4 | Free plan with 50 credits a month. Starter $34, Growth $104 and Scale $209 a month on annual billing ($49, $149 and $299 monthly). |
How did we choose the best cold email and outreach tools?
We included tools with public pricing, substantial review-site evidence, and common use among agencies. Pricing and features come from each vendor page, and ratings come from G2.
We separated data tools, sending tools, and combinations, since a stack often mixes them. Scores reflect fit for agencies running outreach for several clients.
What we looked for
- Job: data, sending, or both.
- Pricing model: per user, by volume, or by credits.
- Channels: email, LinkedIn, SMS, and calling.
- Deliverability: warm-up and sending protections.
- Published security and support evidence.
- Public evidence: review-site ratings and review counts.
Is Apollo.io a good cold email or outreach tool for agencies?
Best prospecting platform: Apollo combines about 240 million contacts with sequences, warm-up, and a free plan, and has the largest G2 base. Prices are annual only, credits are capped, and SOC 2 was not stated.
Apollo.io combines a database of about 240 million contacts and 30 million companies with sequences, a dialer, email warm-up, a deliverability suite, lead scoring and workflows. It has a free plan and Basic, Professional and Organization plans priced per user, with credits granted by plan.
Who it suits: Agencies that want one tool to find prospects and run outbound sequences, without paying separately for data.
Apollo.io pros
- A free plan, with Basic from $49 per user per month on annual billing.
- A database of about 240M contacts and 30M companies.
- Unlimited sequences from Basic, with email warm-up and a deliverability suite.
- GDPR compliance stated, MFA on paid plans and SSO on Organization.
Apollo.io cons
- Monthly-billing prices were not shown; prices are billed annually.
- Organization requires at least 3 seats at $119 per user per month.
- Free allows 900 credits a year and only 2 sequences per team.
- SOC 2 and a security page were not available (the security page returned an error).
Is Instantly a good cold email or outreach tool for agencies?
Best for high-volume cold email: Instantly offers unlimited email accounts and warm-up priced by volume, and the highest G2 score here. Security detail was not stated and leads and CRM cost extra.
Instantly is a cold email platform with unlimited email accounts, unlimited warm-up, a unified inbox, an AI reply agent and a B2B lead database and CRM sold separately. Outreach plans are priced by monthly emails and uploaded contacts.
Who it suits: Agencies that run high-volume cold email for lead generation and want many sending accounts with warm-up at a low price.
Instantly pros
- Unlimited email accounts and unlimited warm-up on outreach plans.
- Growth from $47 a month for 5,000 emails and 1,000 contacts.
- An AI reply agent, a unified inbox and a private deliverability network on Light Speed.
- The highest G2 score in this group.
Instantly cons
- Security, SOC 2, GDPR and SSO were not stated (the security page returned an error).
- Growth caps uploads at 1,000 contacts and 5,000 emails a month.
- Client workspaces, team roles and white-label were not stated.
- Leads and CRM are separate products with their own pricing.
Is lemlist a good cold email or outreach tool for agencies?
Best multichannel outreach: lemlist adds LinkedIn, SMS, and calling to email, with warm-up on every plan and SOC 2 Type 2 evidence. It is priced per user and costs more than volume tools.
lemlist is an outbound sales platform that combines cold email, LinkedIn and SMS automation, a built-in lead database, email warm-up and a deliverability hub. It sells Email and Multichannel plans priced per user, plus a custom Enterprise plan.
Who it suits: Agencies that run cold outreach for themselves or clients and want email, LinkedIn and calling in one tool with built-in deliverability.
lemlist pros
- Email plan includes unlimited users and email senders from $55 per user per month on annual billing.
- Email warm-up and a deliverability hub on every plan.
- Multichannel adds LinkedIn, SMS, WhatsApp add-on and a call dialer.
- SOC 2 Type 2 report in the Trust Center, and two-factor authentication on every plan.
lemlist cons
- Pricing is per user, so cost grows with team size.
- Multiple client workspaces and white-labeling were not stated.
- SSO and SAML are Enterprise only.
- GDPR, ISO 27001, data hosting and mobile apps were not stated.
Is Hunter a good cold email or outreach tool for agencies?
Best low-cost email finder: Hunter finds and verifies emails with a free plan, a browser extension, and an API. Credits are limited, outreach is light, and security detail was not stated.
Hunter helps teams find and verify professional email addresses with Domain Search, Email Finder and Email Verifier, and send cold email through Sequences. It has a free plan with 50 credits a month and paid plans from Starter to Scale, with a browser extension and an API.
Who it suits: Agencies that need to find and verify prospect emails for outreach and link building at a low cost.
Hunter pros
- A free plan with 50 credits a month.
- Starter from $34 a month on annual billing with 2,000 credits.
- Auto-verified lead data on all plans, a browser extension and an API.
- Priority support from Starter and an account manager on Scale.
Hunter cons
- Free allows only 1 connected email account and 500 recipients per sequence.
- Credits are limited, so heavy prospecting needs the higher plans.
- Security and compliance were not stated (the security page returned an error).
- A database size, integration count and mobile apps were not stated.
How much do the best cold email and outreach tools cost?
Pricing models differ. Apollo and lemlist charge per user, Instantly charges by sending volume, and Hunter charges by credits. Compare the total for your team size, monthly sends, and monthly lookups, and add costs for leads, add-ons, and extra domains.
| Tool | Plan | Price | What stands out |
|---|---|---|---|
| Apollo.io | Free | $0 | 900 credits per seat per year; 2 sequences per team; basic email support |
| Apollo.io | Basic | $49 per user per month (annual billing) | 30,000 credits per seat per year; unlimited sequences; email warm-up and deliverability suite; US dialer; chat support |
| Apollo.io | Professional | $79 per user per month (annual billing) | 48,000 credits per seat per year; A/Z testing; unlimited lead scoring; call recordings and AI insights |
| Apollo.io | Organization | $119 per user per month (annual billing) | Minimum 3 seats; 72,000 credits per seat per year; SSO; 12 intent topics; unlimited meeting events and inbound routers |
| Instantly | Growth | $37.60 per month (annual billing); $47 monthly | Unlimited email accounts, 1,000 uploaded contacts, 5,000 emails a month, chat support |
| Instantly | Hypergrowth | $77.60 per month (annual billing); $97 monthly | Unlimited email accounts, 25,000 uploaded contacts, 125,000 emails a month, premium live support |
| Instantly | Light Speed | $286.30 per month (annual billing); $358 monthly | 100,000 uploaded contacts, 500,000 emails a month, private deliverability network |
| lemlist | $55 per user per month (annual billing); $69 monthly | Unlimited users and email senders, email and phone finder, 650M+ lead database, warm-up and deliverability hub | |
| lemlist | Multichannel | $87 per user per month (annual billing); $109 monthly | Email plan plus 5 senders per user, LinkedIn and SMS automation, call dialer |
| lemlist | Enterprise | Custom | Custom roles and permissions, SSO and SAML, dedicated account manager, priority support |
| Hunter | Free | $0 per month (monthly billing) | 50 credits a month, 1 connected email account, 500 recipients per sequence |
| Hunter | Starter | $34 per month (annual billing); $49 monthly | 2,000 credits a month, 3 connected email accounts, 2,500 recipients per sequence |
| Hunter | Growth | $104 per month (annual billing); $149 monthly | 10,000 credits a month, 10 connected email accounts, 5,000 recipients per sequence |
| Hunter | Scale | $209 per month (annual billing); $299 monthly | 25,000 credits a month, 20 connected email accounts, 15,000 recipients per sequence, account manager |
| Hunter | Enterprise | Custom | Custom credits and limits |
What do reviewers say about these cold email and outreach tools?
G2 evidence is strong for all four. Apollo has the largest base, Instantly the highest score, and lemlist a large base too. Hunter has the smallest base. Scores are close, so use free plans and trials to separate them.
| Tool | Source | Rating | Number of reviews |
|---|---|---|---|
| Apollo.io | G2 | 4.7 / 5 | 9,848 |
| Instantly | G2 | 4.8 / 5 | 4,157 |
| lemlist | G2 | 4.6 / 5 | 2,424 |
| Hunter | G2 | 4.4 / 5 | 656 |
Reviewer themes for Apollo.io
- G2 shows Apollo.io at 4.7 from 9,848 reviews.
- G2 data shows 86% of reviewers give five stars.
Reviewer themes for Instantly
- G2 shows Instantly at 4.8 from 4,157 reviews.
- G2 data shows 91% of reviewers give five stars.
Reviewer themes for lemlist
- G2 shows lemlist at 4.6 from 2,424 reviews.
- Reviewers praise the detailed analytics and statistics that feed monthly growth reports.
Reviewer themes for Hunter
- G2 shows Hunter at 4.4 from 656 reviews.
- Reviewers praise ease of use and accuracy in finding and verifying professional emails.
How do you choose the right cold email or outreach tool for your agency?
Start by deciding whether you need data, sending, or both. Data points to Apollo or Hunter, volume points to Instantly, and multichannel points to lemlist.
Whichever you choose, set up dedicated sending domains and warm-up before your first campaign, since deliverability decides results more than features.
A quick decision guide
- A database plus sequences with a free start: Apollo.
- High-volume cold email with unlimited accounts: Instantly.
- Multichannel sequences with SOC 2 evidence: lemlist.
- A simple, low-cost email finder: Hunter.
- A full stack: Hunter or Apollo for data with Instantly or lemlist for sending.
Frequently asked questions
- What is the best cold email tool for agencies?
- Instantly for volume, lemlist for multichannel, and Apollo for data plus sequences.
- Which tool has the biggest database?
- Apollo, with about 240 million contacts.
- Which tool has a free plan?
- Apollo and Hunter.
- Which tool states SOC 2?
- lemlist states a SOC 2 Type 2 report.
- How were the tools rated?
- Ratings come from G2, and the editorial scores are our own judgement of fit for agencies.
Sources
Prices, plan limits, and ratings were gathered in October 2026 from:
- Apollo pricing page
- Instantly pricing page
- lemlist pricing page
- Hunter pricing page
- G2