AI for sales outreach and lead research: free tiers give 50 to 100 credits a month
AI for sales outreach and lead research on a free budget: Apollo, Hunter, Twenty and listmonk, with checked limits and a first-week plan.
Thirty spam reports out of 10,000 delivered emails is the entire allowance before a sender reaches the 0.3% complaint ceiling that Gmail and Yahoo set, according to EmailWarmup's 2026 guide to bulk sender rules. Cold email is the category that draws the most complaints.
The reward for staying under that line is small. Instantly's 2026 benchmark report, which covers sending from January to December 2025, puts the platform average reply rate at 3.43%. About 96 of every 100 prospects never answer.
A founder without a sales team does three jobs by hand: finding the right people, writing to them, and keeping the sending domain healthy. AI for sales outreach and lead research can speed up the first two. The third stays with a person. This guide covers four tools a startup can open this week, two commercial products with free tiers and two open-source ones, with their limits written down.
One caution on prices. Vendor pricing pages change often and several figures below come from recent third-party reviews, which sometimes disagree with each other. Where they disagree, the text says so. Confirm every number on the vendor's own page before paying.
What AI for sales outreach and lead research can and cannot do
The AI part is narrow. It helps search a contact database, summarise a company and draft a first version of an email. Saleshandy's Apollo breakdown says the free plan caps Apollo's AI assistant at 5 chats. SaaS CRM Review reports that Hunter's free plan allows 10 AI Assistant searches a month in its Discover tool. Free tiers let a founder try a product and stop well short of running a campaign.
Instantly's guide to AI sales agents for startups says deliverability and data hygiene explain the gap between top senders and everyone else. It also says human speed and judgment still matter when a reply has to turn into a booked call. That is a vendor's view, but it matches what the free tiers show: AI speeds up the list and the draft, and a person judges fit and holds the conversation.
Is Apollo.io free for startups?
Yes, Apollo.io has a free plan, and it is small enough that it works best as a test of the data.
Apollo combines a contact database with email sequences. SyncGTM's review puts the database at 240 million contacts. Articuler reports that revealing an email costs 1 credit, a phone number costs 8, and unused credits do not roll over.
Reviews disagree on the free allowance. Articuler and Coldlytics (checked 13 October 2026) list 75 credits a month. Saleshandy lists 1,200 credits a year, granted as 100 a month. Apollo's own pricing page did not state the free credit count or the Basic price when opened for this guide, so check the plan page in your account before relying on either figure.
Coldlytics and Hacking Demand both report 2 active sequences and a cap of 250 emails a day on the free plan. Paid Basic costs $49 per user per month on annual billing or $65 monthly, according to Articuler.
The weakness is credits. Hacking Demand says the free plan works for testing data quality but is too constrained for a real outbound programme.
Hunter.io
Hunter finds and verifies work email addresses for a company domain. Hunter's pricing page lists a free plan with 50 credits a month. Starter is $49 a month, or $34 a month billed yearly, and includes 2,000 credits a month.
One credit finds one email and half a credit verifies one, and searches that find nothing are free, according to SyncGTM's Hunter review. SaaS CRM Review translates that into 50 found emails or 100 verifications a month, shared by everyone on the account. Older reviews describe 25 searches and 50 verifications on the free plan. Inbound Labs says that model has been replaced by the single credit pool.
The weakness is volume. SaaS CRM Review calls the free allowance enough to check data quality on a handful of target accounts, not to prospect.
Open-source options: Twenty CRM and listmonk
Open-source tools cost nothing to license, but they cost setup time and hosting. Both tools here need a technical person on the team.
Twenty is a CRM for tracking leads and deals. The repository is github.com/twentyhq/twenty. freealternatives.to reports that the core is under the AGPL-3.0 licence, with a commercial licence on files marked Enterprise. Self-hosting is free, but it needs Docker and a PostgreSQL database, and updates and backups are the team's job.
The hosted version has no permanent free tier. According to freealternatives.to, it offers a free trial and then Pro at $9 per user per month. Twenty's own pricing page lists Pro at $9 per user per month and Organization at $19, and says the open-source core can be self-hosted for free. FluidCRM adds that a self-hosted server still has to be paid for, and that SSO and row-level permissions cost $19 per user per month even on your own server.
Twenty ships releases often. The releases page showed v2.37.0, tagged 28 August, as the latest when checked on 25 October 2026 (the page gave no year), so check it again before installing. The notes for v2.30.0 carried a security update and told self-hosters to update, which shows the maintenance load that comes with running it yourself. freealternatives.to also lists thin integrations among Twenty's limits.
listmonk is a newsletter and mailing list manager, at github.com/knadh/listmonk. Its installation docs describe a single binary that needs a Postgres database, and it can run through Docker Compose. The releases page marks v6.2.0, published 26 June 2026, as the latest stable release, with a note to back up Postgres before upgrading. A v7.0.0-beta.1 was released on 20 October 2026, per listmonk.app. The beta is not a stable release. The repository's licence file is the AGPL-3.0, so anyone hosting a modified version for others has to offer its users the source.
The weakness is purpose. A mailing list manager suits follow-ups to people who already know the founder, and it does not replace a cold email platform. A separate SMTP service is needed for sending.
| Paid tool | Reported cost | Free or open-source option | Catch |
|---|---|---|---|
| Apollo Basic | $49 per user per month annual, $65 monthly (Articuler) | Apollo Free: 75 credits a month in most reviews | Small credit pool, 2 sequences |
| Hunter Starter | $49 a month, $34 billed yearly (Hunter) | Hunter Free: 50 credits a month | Fits testing, not volume |
| Twenty Cloud Pro | $9 per user per month (Twenty) | Twenty self-hosted: no licence fee | Docker and PostgreSQL to run; you pay for the server |
| Instantly AI sales agent stack | Starts around $141 a month (Instantly) | listmonk: free software, you pay for SMTP and a server | Built for opt-in lists, not cold prospecting |
The email rules and the Indian privacy law that limit your outreach
According to Mailsoftly's 2026 comparison, Gmail and Yahoo both require a spam complaint rate under 0.3%, and Gmail asks senders to aim under 0.1%. About 5,000 messages a day counts as bulk sending at Gmail. Unsubscribes must be honoured within two days. EmailWarmup adds that Google moved from temporary delays to permanent rejections in November 2025.
EmailWarmup also says cold campaigns routinely see complaint rates of 0.5% to 1% without careful list hygiene. Instantly's guide says an AI sales stack only works if domains are warmed for 4 to 6 weeks and bounces stay below 2%.
India adds a second layer. The Digital Personal Data Protection Rules were notified in the Gazette on 13 November 2025. ConsentOS's status table says the main obligations on data fiduciaries start on 13 May 2027, 18 months later. The Press Information Bureau's note on the Rules says the highest penalty, up to ₹250 crore, applies to failing to maintain reasonable security safeguards. Any list of personal data that a startup stores in a CRM falls under that duty once it applies.
Scraped lists carry extra risk because the person never gave the data to the sender. A lawyer should review the approach before scaling. This article is not legal advice.
A first-week checklist
The order matters. Fix the sending setup first and test with a small list.
- Write down who you sell to: job title, company size, city and one problem they have. Keep it to one paragraph.
- Buy a secondary domain for sending and set SPF, DKIM and DMARC on it, so cold sending stays away from the main business domain.
- Open free accounts on Apollo and Hunter. Pull 50 to 100 contacts that match your paragraph.
- Verify every address before sending. Hunter's verification costs half a credit each.
- Pick a CRM. Use Twenty's cloud trial if nobody can run a server, or self-host it if someone can.
- Draft each email with an AI assistant, then rewrite it so it names something true about the recipient's business. Add a working unsubscribe line.
- Send a small batch, read the replies personally, and check complaint and bounce numbers before sending more.
A week gets the setup done and one small test sent. Warm-up takes 4 to 6 weeks, so reply data arrives after that.
Sources
- Gmail and Yahoo Bulk Sender Requirements (EmailWarmup)
- AI sales agent benchmarks 2026 (Instantly)
- AI sales agents for startups (Instantly)
- Apollo.io Pricing 2026 (Saleshandy)
- Apollo Pricing in 2026 (Articuler)
- Apollo.io Pricing 2026 (Coldlytics)
- Apollo.io Pricing 2026 (Hacking Demand)
- Apollo.io Review 2026 (SyncGTM)
- Hunter pricing
- Hunter.io Pricing 2026 (SaaS CRM Review)
Drafted with AI assistance from public reporting and company announcements. How we work · Report a correction
