OnyxSend vs Instantly.ai: managed outreach or DIY cold email tool?
Instantly.ai is a solid self-serve platform for teams that already have lists, copywriters, and the bandwidth to manage sequences. OnyxSend is a fully managed service: we source the prospects, write the outreach, handle deliverability, and hand you booked meetings.
Pricing
| OnyxSend | Instantly.ai | |
|---|---|---|
| Starting price | $997/mo (Growth) | From ~$37/mo (Growth) |
| Free tier | No | Free trial available |
| What you're buying | Managed pipeline service | Email sending infrastructure |
| Prospect sourcing | Included, 1,000/mo+ | Not included, bring your own |
| Outreach copywriting | Included | Not included |
| Deliverability management | Fully managed | Inbox warmup tool (self-managed) |
| Meeting booking workflows | Included (Pro and Scale) | Not included |
| Multi-channel orchestration | Included (Pro and Scale) | Email-focused |
| Dedicated sequences | 5 (Growth), unlimited (Pro+) | Unlimited on most plans |
| Unlimited sending inboxes | Managed pool (no cap) | Yes (via inbox marketplace) |
| API access | Scale plan | Available on higher tiers |
Features compared
| Feature | OnyxSend | Instantly.ai |
|---|---|---|
| Prospect research and account context | Yes | No |
| AI-tailored outreach writing | Yes | No |
| Managed deliverability | Yes | No (warmup tool only) |
| Inbox warmup | Yes | Yes |
| Inbox rotation marketplace | No | Yes |
| Active sequences | 5 (Growth), unlimited (Pro+) | Unlimited |
| Meeting booking workflows | Yes (Pro and Scale) | No |
| Multi-channel orchestration | Yes (Pro and Scale) | No |
| Weekly performance review | Yes (Growth+) | No |
| Full-funnel analytics | Yes (Pro and Scale) | Basic reporting |
| Priority campaign optimization | Yes (Pro and Scale) | No |
| API access | Yes (Scale) | Yes (higher tiers) |
| Enterprise rollout support | Yes (Scale) | No |
| Done-for-you service model | Yes | No |
Pick OnyxSend if
- You want researched prospects, written sequences, and booked meetings without hiring an SDR or buying separate tools for data, copy, and sending.
- Your team doesn't have bandwidth to source leads, A/B test subject lines, and monitor deliverability week over week.
- You need multi-channel orchestration and meeting booking workflows built into the same service, not bolted on later.
- You're measuring success in qualified meetings on the calendar, not open rates or inbox counts.
Pick Instantly if
- You already have a prospecting workflow, in-house copywriters, and a team to run sequences; you just need reliable cold email infrastructure at low cost.
- You want maximum control over your sending setup, unlimited inboxes, and the flexibility to rotate domains from a marketplace.
FAQs
What is the main difference between OnyxSend and Instantly.ai?
Instantly.ai is a DIY cold email tool: you supply the prospect list, write the copy, and manage your sequences yourself. OnyxSend is a managed service. We research 1,000 to 10,000 qualified prospects per month depending on your plan, write tailored outreach for each account, manage deliverability, and run the sequences. The output you're buying is booked meetings, not just sending capacity.
Does Instantly.ai write email copy for me?
No. Instantly.ai provides the infrastructure to send cold email at scale, but prospect sourcing and copywriting are your responsibility. OnyxSend includes tailored outreach writing for every prospect based on account-level research, so no in-house copywriter or SDR is required.
How does OnyxSend handle deliverability compared to Instantly.ai?
Instantly.ai offers an inbox warmup feature and an inbox rotation marketplace so you can manage deliverability yourself. OnyxSend handles deliverability end to end: domain health, warmup, send-rate pacing, and sequence adjustments are all managed by our team. You get a weekly performance review and campaign optimization on Pro and Scale plans.
Is OnyxSend worth the higher price if I already use Instantly.ai?
Depends on where your bottleneck is. If you're hitting deliverability limits or inbox caps, Instantly.ai's infrastructure plans solve that problem cheaply. If your bottleneck is finding the right prospects, writing copy that gets replies, and converting those replies into meetings, OnyxSend replaces that entire workflow at 1,000 to 10,000 researched prospects per month.
Does OnyxSend do multi-channel outreach or just cold email?
Multi-channel orchestration is included on the Pro ($2,497/mo) and Scale ($4,997/mo) plans. Growth covers email sequences only. Instantly.ai is primarily an email sending platform; multi-channel is not a native feature.
Which is better for a solo founder or small team?
If you have under five hours per week to spend on outbound, OnyxSend's Growth plan at $997/mo gives you 1,000 researched prospects, five active sequences, and full deliverability management without needing a dedicated hire. Instantly.ai is a better fit if you or someone on your team can commit meaningful time to running the tool, sourcing lists, and iterating on copy.