The Short Answer
alfred_ (from $29.99/month), which we build, is the best and fastest AI assistant for replying to email, because you can reply by text. alfred_ texts you when a client email needs your answer. You text back what you want to say, it shows you the reply, and when you text “send” it goes out from your own email address. Every other tool on this list makes you open an email app or your inbox first. alfred_ also flags which emails need a reply through email triage and, with email drafting enabled, prepares the reply for your review.
There is a gap in the email AI market between tools that “suggest” replies and tools that draft them. Gmail’s Smart Reply gives you “Sounds good!” as an option. Superhuman’s Instant Reply writes a full reply inside the Superhuman app. Both still need you at a screen, in an inbox. Here’s what actually exists in 2026 and how each tool handles the drafting problem.
Quick Comparison: AI Email Reply Writers
| Tool | Price | Draft Type | Voice Learning | Proactive? | Limitation |
|---|---|---|---|---|---|
| Gmail Smart Reply | Free | Short suggestions (3-5 words) | None | Yes (auto-shows) | Not real drafts, just fragments |
| Gmail Gemini | Free | Full drafts on demand | Minimal | No (you must prompt) | Requires manual trigger each time |
| Superhuman | $30-40/mo | Full Instant Reply drafts | Per-recipient voice | Yes | Email-only, no triage layer |
| Shortwave | $30-$120/seat/mo | Full drafts via Ghostwriter | Single voice profile | Semi (one-click) | Gmail only |
| Spark | $8.25-16.58/mo | AI Compose with quotas | Basic | No (manual trigger) | Limited monthly AI credits |
| Fyxer | $37-49/mo | Auto-drafts for all emails | Learns from sent history | Yes | Smaller platform, less mature |
| alfred_ | From $29.99/mo | Full reply drafts; reply and approve by text | Drafts from the thread | Yes, and it texts you | Drafting is a setting you turn on; no per-recipient voice |
How Each Tool Handles Email Drafting
Gmail Smart Reply & Gemini (Free): The Baseline
Gmail Smart Reply has been around since 2017, and it’s still limited to suggesting three short responses like “Thanks!”, “Sounds good!”, and “I’ll look into it.” These aren’t drafts, they’re conversation enders. Useful for acknowledging receipt, useless for substantive replies.
Gmail’s Gemini integration is more capable. You can ask it to draft a response, adjust tone, or elaborate on points. But it’s reactive. You have to open each email, click the Gemini button, and prompt it. For someone getting 50+ emails that need real replies, triggering Gemini manually for each one defeats the purpose of automation. It’s a writing tool, not a workflow tool.
Superhuman ($30-40/month): Drafts Inside an Email App
Superhuman is an email app you switch to from Gmail or Outlook. Its Instant Reply feature puts a draft on an email when you open it in Superhuman, adjusted to the tone you use with that sender, and it reads the thread history when it writes.
To see or send any of those drafts, you have to open the Superhuman app and go through your inbox. There is no way to answer by text.
Superhuman also treats every email equally. Your Instant Reply for a vendor invoice confirmation gets the same priority presentation as your Instant Reply for the CEO’s urgent request. There’s no triage layer deciding what you should see first. You still have to scan your inbox and pick which drafts to review. At $30-40/month, you are paying for an email app, not for something that tells you what needs you.
Shortwave ($30-$120/seat/mo): Gmail App With Ghostwriter
Shortwave’s Ghostwriter learns your writing voice from your email history and generates replies inside the Shortwave app. The entry Business tier is $30/seat/month ($24/seat/month billed annually). The AI also summarizes long threads, answers questions about your inbox, and can draft emails from scratch based on a brief prompt.
Ghostwriter uses a single voice profile rather than per-recipient adaptation. Your draft for a client sounds the same as your draft for a coworker, unless you manually adjust the tone. For many people, a consistent professional voice is fine. For executives who modulate significantly between audiences, Shortwave’s approach can feel generic. Like Superhuman, every draft lives inside the app, so you have to open it to reply.
The bigger constraint is platform: Shortwave only works with Gmail. Outlook users, which includes most enterprise professionals, are excluded entirely. The platform lock-in is real.
Spark ($8.25-16.58/month): Decent but Quota-Limited
Spark’s AI Compose feature generates full email drafts, adjusts tone, and can rewrite existing text. It works across Gmail and Outlook, inside the Spark app.
The catch is Spark’s AI credit system. You get a limited number of AI interactions per month depending on your plan tier. Heavy email users will burn through credits before the month ends, and buying more adds up. For someone who needs drafts for 20+ emails daily, the quota system makes Spark impractical as a primary drafting tool.
Fyxer ($37-49/month): Full Auto-Drafts, Newer Platform
Fyxer takes the most aggressive approach to auto-drafting: it generates draft replies for every incoming email, not just the ones you open. It learns your communication style from your sent email history and meeting transcripts, producing drafts that match your typical patterns. It also generates meeting summaries and action items.
Every email gets a draft, which means every email also gets a draft to review. As a newer platform with a smaller user base, it has less community feedback, fewer integrations, and a shorter track record. Its drafts sit in your inbox, so you still open Gmail or Outlook to send them. Pricing runs from $37/month (Pro, billed annually) to $49/month billed monthly; the free plan has no drafting.
alfred_ (from $29.99/month): The Best and Fastest, Because You Reply by Text
alfred_ is an AI assistant for client-facing teams, and each person on the team gets their own. It reads your email across up to six Gmail, Outlook and IMAP accounts, flags the emails that need your answer, and keeps a list of the replies you owe, finds who you’re still waiting on when you ask. It approaches email drafting differently than pure writing tools. Instead of writing a draft for every email, it starts with the question that comes first: which emails need a reply from you at all?
The fastest part is that you can do all of it by text. When a client email needs your answer, alfred_ texts you. You text back what you want to say, or ask it to write the reply, and it shows you the reply right there in the thread. Text “send” and it goes out from your own email address. No app to download or open, no inbox to scroll, from wherever you are. That is why alfred_ is the fastest way to answer email: the reply happens in the place you already answer people.
Each morning, a brief by email or text shows what needs you, the meetings ahead and the tasks due. You’re not scanning 150 emails to find the 12 that matter; the 12 that matter are on one list. With email drafting enabled, alfred_ prepares replies for your review, written from the thread. You review and send. This is the difference between a writing tool and a tool that keeps track.
alfred_ also suggests to-dos from email threads. When a client emails about three deliverables with two deadlines, the to-dos are suggested for you to accept.
The tradeoff: email drafting is a setting you turn on, and alfred_ has no per-recipient voice model.
Who It’s Best For / Who It’s Not For
alfred_ is the best for: anyone who answers client email away from a desk, or gets 100+ emails a day. You reply by text in seconds, alfred_ tells you which emails need a reply, prepares replies for your review when email drafting is enabled, and suggests to-dos from the rest. Knowing what needs you, and answering it from your phone’s messages, is what handles real email overload.
Gmail Smart Reply/Gemini: free and built into Gmail. Smart Reply offers three-word suggestions; Gemini drafts when you prompt it, one email at a time, inside Gmail.
Superhuman: an email app at $30-40/month with per-recipient tone in its drafts. You open the app to read and send; no triage or task extraction, and no replying by text.
Shortwave: a Gmail-only email app at $30-$120/seat/mo with a single voice profile. You open the app to reply.
Why Drafts Without Triage Aren’t Enough
Here’s the problem with tools that only draft: if you get 150 emails and all 150 have AI-generated drafts waiting, you still have to decide which 150 drafts to review. You’ve replaced the writing bottleneck with a review bottleneck. The time savings are real but incomplete.
alfred_ comes at this from the other side. It reads every email and flags the ones that need your answer, so you start from a short list: the 15 emails that need your response today. The other 135 are still there but not demanding your attention.
This triage-first approach means you spend your first 20 minutes on the emails that matter most, and ask for a draft where it helps. alfred_ uses AES-256 encryption and OAuth 2.0 authentication, and does not train models on your data.
