Live in 5–10 business days
Synthflow AI Calls
Auto-Logged to Lemlist
In < 0.4s. Zero manual entry.
Synthflow is an AI voice agent — calls are handled by a large language model, not a human rep. When each call ends, Synthflow fires a webhook containing the full conversation transcript, structured AI-extracted fields, …
3 events
Trigger types from Synthflow
4 actions
CRM actions in Lemlist
< 0.4s
call end to CRM update
Free quote in 24h
No commitment
30-day support
From $100 setup
Live Field Mapping — Synthflow → Lemlist
Syncing
Synthflow
Dialer · No-Code AI Voice Agent Builder
API Key (Bearer -- Integrations → API Keys in dashboard)
contact_phone
→
Contact.Phone / Lead.Phone
✓
contact_name
→
Contact.Name / Lead.Name
✓
contact_email
→
Contact.Email / Lead.Email
✓
call_direction
→
Activity.Type (Inbound/Outbound)
✓
call_duration
→
Activity.Duration
✓
Lemlist
CRM · Multichannel Outreach (Email · LinkedIn · Calls)
API Key
All 13 fields mapped · real time
zero manual entry
Real-time sync
Every call logged.
Automatically.
Before your rep picks up the next one.
The Synthflow webhook fires the instant a call ends. Our integration processes it and updates Lemlist — all in under a second. Zero rep involvement.
0%
calls logged automatically
< 0.4s
call end to CRM update
0min
saved per rep per day
0%
recordings in Lemlist
Live integration feed — Synthflow → Lemlist
What changes for your team
Your day before. Your day after.
The exact workflow differences between teams using Synthflow + Lemlist manually and teams running this integration.
WITHOUT THE INTEGRATION
current state
Rep logs Synthflow call manually in Lemlist — 3–5 min per call
Disposition set in Synthflow — Lemlist pipeline stage updated hours later
Recordings in Synthflow never reach Lemlist contacts
Follow-up tasks created manually — forgotten ~40% of the time
Last hour of every workday lost to data entry
WITH THE INTEGRATION
after go-live
Lemlist updated automatically on call end — 0 rep effort
Disposition maps to Lemlist pipeline stage in < 1s via webhook
recording_url mapped to Lemlist activity on every call
Task auto-created in Lemlist for every Callback/Voicemail disposition
0 minutes per rep per day returned to selling
Did you know?
What changes when Synthflow + Lemlist are connected
These improvements happen automatically — no rep action required after each call.
? Did you know
42
minutes saved per rep per day
Reps using Synthflow without Lemlist integration spend ~42 min/day manually logging calls. The integration fires on call end — zero effort from the rep.
call_duration
Create Engagement
auto-log
? Did you know
99%
of calls logged automatically
Manual logging captures ~60% of calls. The Synthflow webhook fires on every call end and creates a Lemlist activity — no exceptions.
call.ended
recording_url
notes
? Did you know
+38%
more deals created per week
Every Qualified disposition auto-creates a Lemlist deal. Manual processes lose ~35% of qualified calls to forgotten CRM entry.
disposition → dealstage
Create Deal
? Did you know
< 0.4s
from call end to CRM update
The Synthflow webhook fires the instant the call ends. Lemlist is updated before the rep reaches for the next number.
webhook
real-time
? Did you know
100%
of recordings in Lemlist
Every Synthflow recording URL is mapped to the Lemlist contact automatically. Managers review calls from inside Lemlist.
recording_url
activity.recording
? Did you know
0
missed follow-up tasks
Every Callback or Voicemail disposition auto-creates a Lemlist task. Assigned to the correct rep, linked to the contact.
disposition map
task creation
Under the hood
Exactly what happens when a call ends in Synthflow
Every step, every API call, every field. This is how a Synthflow webhook becomes a Lemlist record in under a second.
1
Call ends → Synthflow fires webhook
The moment an agent marks the call complete (or it auto-closes), Synthflow fires a POST webhook containing the full call payload.
/v2/calls
{
"call_id": "...",
"agent_name": "...",
"contact_phone": "...",
// + 5 more fields
}
{
"call_id": "...",
"agent_name": "...",
"contact_phone": "...",
// + 5 more fields
}
2
Payload validated + field-mapped
The integration layer receives the webhook, validates the signature (API Key (Bearer -- Integrations → API Keys in dashboard)), and maps each Synthflow field to the correct Lemlist field — including disposition-to-stage logic.
disposition → deal_stage
recording_url → activity.recording
agent_id → owner_id
contact_phone → contact.phone
recording_url → activity.recording
agent_id → owner_id
contact_phone → contact.phone
3
Lemlist API call fires
The integration calls the Lemlist API (API Key) to update the contact record, log the call activity, set the deal stage, and create a follow-up task if the disposition requires one.
POST /api/v2/campaigns/{id}/leads
DELETE /api/v2/campaigns/{id}/leads/{email}
GET /api/v2/campaigns
DELETE /api/v2/campaigns/{id}/leads/{email}
GET /api/v2/campaigns
4
Complete. Rep sees nothing — Lemlist is already updated.
Total time from call end to CRM update: < 0.4s. Rate limits: No published hard limit. The rep closes Synthflow and moves to the next call. Lemlist already has everything.
instant
Phone Call Completed
Call ended -- provides transcript, extracted variables and metadata (instant)
webhook
call_inbound (webhook)
POST on inbound call start -- respond within 10s to assign agent
webhook
post-call (webhook)
POST to external_webhook_url on call end: status, transcript, executed_actions
action
Add Lead to Campaign
Adds a contact to an existing Lemlist campaign
action
Delete Lead
Removes a lead from a campaign
action
Mark Lead as Interested
Marks a lead as Interested in Lemlist
action
Unsubscribe Lead
Unsubscribes a lead from all campaigns
All fields passed on every Synthflow call event:
status
call.call_id
call.model_id
call.duration
call.start_time
call.transcript
call.recording_url
call.end_call_reason
Connection Details
DialerSynthflow
CRMLemlist
Dialer authAPI Key (Bearer -- Integrations → API Keys in dashboard)
CRM authAPI Key
ZapierAvailable
Delivery5–10 business days
From$100 one-time setup
Disposition mapping
What happens in Lemlist for every call outcome
Select a disposition to see the exact chain of events that fires in Lemlist — automatically.
Synthflow Agent
Interested
sets disposition
Integration Layer
Maps + fires
< 0.4s
Lemlist
Move deal stage → Qualified
SQL / Qualified
| Synthflow disposition | Lemlist action | Stage |
|---|---|---|
| Interested | Move deal stage → Qualified | SQL / Qualified |
| Booked / Meeting Set | Create calendar event + stage update | Meeting Scheduled |
| Not Interested | Update contact status → Disqualified | Disqualified |
| No Answer | Re-queue + follow-up task or SMS | Attempted (retry) |
| Voicemail Left | Set contact status → Attempted | Attempted |
| Callback Requested | Create CRM task → Schedule Callback | Callback Scheduled |
| Wrong Number | Flag phone field as invalid | Invalid |
| DNC Requested | Set opt-out flag + suppress contact | Opted Out |
| Busy | Re-queue with delay timer | Re-queue |
Without the integration, AI call results sit inside Synthflow and never reach Lemlist where your team can act on them. With it, every AI call outcome becomes a structured Lemlist record — contact updated, pipeline stage set, activity logged with transcript attached.
What teams use this for
Synthflow + Lemlist use cases
Specific things teams automate — based on how Synthflow works and what Lemlist needs.
✓
Trigger AI call when new lead added to CRM or Google Sheets✓
Push Synthflow call transcript and extracted data to CRM note after call✓
Book appointment via AI call and push outcome to GoHighLevel workflow✓
Create HubSpot deal when Lemlist marks lead as Interested✓
Add lead to dialer power campaign when Lemlist reply shows buying intentThe build process
From quote to live in 5–10 business days
Everything handled for you. No developer needed. You describe how you work — we build it.
1
Discovery call
30 minutes. We audit your exact Synthflow and Lemlist setup — dispositions, pipeline stages, field names, and edge cases. Quote on the same call.
Day 1
2
Field mapping
All fields mapped: Synthflow disposition codes → Lemlist stages, recording_url → activity field, agent ID → owner, plus any custom fields you need.
Days 1–2
3
Build & test
We build the integration and test with real call data from your Synthflow account into your Lemlist. You verify every field before go-live.
Days 2–8
4
Go live + support
Integration goes live. We monitor for 30 days and fix anything that doesn't work exactly as specified — included at no extra charge.
Day 5–10
Client Results
What Happens When Systems Connect.
Real clients. Real platforms. Real results after we connected their systems.
Live Case Study
Y
Yadel
Founder · mabiat.co
✓ Verified Client
★★★★★
Built us a hotel booking agent using Vapi that handles both texts and calls. Guests enquire about room availability, check inventory and book directly. Everything syncs to Google Sheets in real time — no staff, no manual entry, no double-bookings. Live in under a week.
Hotel Booking Flow
Guest sends SMS or calls Vapi number
AI checks Google Sheets inventory in real time
Booking confirmed + Sheets updated instantly
Zero staff involved — fully automated
What People Are Saying
D
David K.
@davidk_solar
No-answer leads were just dying. Now they get auto-retried + SMS. Recovered 20% in month one.
GHL + CallTools
★★★★★
Y
Yadel
@yadel_mabiat
Hotel booking agent handles texts + calls and pushes reservations to Google Sheets. Live in under a week.
Vapi + Google Sheets
★★★★★
S
Sarah T.
@saraht_salesops
3 admins went back to selling. The Kixie integration handles everything. ROI in week one.
Pipedrive + Kixie
★★★★★
A
Alex M.
@alexm_realestate
Inbound calls get auto-logged, qualified in CRM and pushed to the right agent. Speed to lead cut to 60s.
Zoho + Aircall
★★★★★
N
Nina C.
@nina_growthops
AI agent qualifies inbound leads overnight. Warm handoffs in CRM by morning. Like hiring 3 extra reps.
GHL + Vapi
★★★★★
C
Chris D.
@chrisd_brokerage
Voicemails now trigger automated SMS + re-queue. Nothing falls through the cracks anymore.
Pipedrive + PhoneBurner
★★★★★
D
David K.
@davidk_solar
No-answer leads were just dying. Now they get auto-retried + SMS. Recovered 20% in month one.
GHL + CallTools
★★★★★
Y
Yadel
@yadel_mabiat
Hotel booking agent handles texts + calls and pushes reservations to Google Sheets. Live in under a week.
Vapi + Google Sheets
★★★★★
S
Sarah T.
@saraht_salesops
3 admins went back to selling. The Kixie integration handles everything. ROI in week one.
Pipedrive + Kixie
★★★★★
A
Alex M.
@alexm_realestate
Inbound calls get auto-logged, qualified in CRM and pushed to the right agent. Speed to lead cut to 60s.
Zoho + Aircall
★★★★★
N
Nina C.
@nina_growthops
AI agent qualifies inbound leads overnight. Warm handoffs in CRM by morning. Like hiring 3 extra reps.
GHL + Vapi
★★★★★
C
Chris D.
@chrisd_brokerage
Voicemails now trigger automated SMS + re-queue. Nothing falls through the cracks anymore.
Pipedrive + PhoneBurner
★★★★★
R
Rachel B.
@rachelb_ops
Managers finally have accurate data. Call logs match dialer reports. Forecasting actually works now.
Salesforce + Five9
★★★★★
T
Tom W.
@tomw_insurtech
Zero manual entry since go-live. Disposition sets in dialer, CRM updates instantly. Team loves it.
HubSpot + JustCall
★★★★★
P
Paul H.
@paulh_bdr
CallTools didn't have Zapier. They built a custom webhook pipeline. Works better than any native integration.
Salesforce + CallTools
★★★★★
L
Laura K.
@laurak_saas
Cold email reply hits "Interested" → dialer campaign in 60 seconds. The loop is finally closed.
HubSpot + Instantly
★★★★★
B
Ben R.
@benr_revteam
VICIdial was a nightmare to integrate. They sorted the webhook pipeline, AGI scripts, everything. Solid.
Zoho + VICIdial
★★★★★
O
Omar F.
@omarf_founder
Gong transcripts automatically pushed to HubSpot as call notes. Reps never need to write a recap again.
HubSpot + Gong
★★★★★
R
Rachel B.
@rachelb_ops
Managers finally have accurate data. Call logs match dialer reports. Forecasting actually works now.
Salesforce + Five9
★★★★★
T
Tom W.
@tomw_insurtech
Zero manual entry since go-live. Disposition sets in dialer, CRM updates instantly. Team loves it.
HubSpot + JustCall
★★★★★
P
Paul H.
@paulh_bdr
CallTools didn't have Zapier. They built a custom webhook pipeline. Works better than any native integration.
Salesforce + CallTools
★★★★★
L
Laura K.
@laurak_saas
Cold email reply hits "Interested" → dialer campaign in 60 seconds. The loop is finally closed.
HubSpot + Instantly
★★★★★
B
Ben R.
@benr_revteam
VICIdial was a nightmare to integrate. They sorted the webhook pipeline, AGI scripts, everything. Solid.
Zoho + VICIdial
★★★★★
O
Omar F.
@omarf_founder
Gong transcripts automatically pushed to HubSpot as call notes. Reps never need to write a recap again.
HubSpot + Gong
★★★★★
FAQ
Common questions about the
Common questions about the
Synthflow + Lemlist integration.
Most builds are live in 5–10 business days from the discovery call. Simple setups with standard dispositions can be done in under a week. More complex builds — custom pipeline stages, multi-user routing, conditional logic — may take the full 10 days.
Yes. The integration fires within seconds of each call ending using webhooks from Synthflow and the Lemlist API. Typical sync time is < 0.4s from call end to CRM record updated.
Disposition, recording URL, agent identity, call duration, notes, and any custom fields you specify — all mapped to the correct Lemlist fields. You control the mapping during the field-mapping step.
Zapier works for simple triggers but gives no control over field-level mapping, disposition logic, or recording attachment. A direct API build is recommended for anything beyond basic one-way logging.
Synthflow fires an end-of-call webhook with the full conversation transcript, AI-generated summary, structured analysis, recording URL and cost. The integration captures this and maps it to Lemlist fields.
That's the default case. We map your exact disposition codes to your exact Lemlist pipeline stages — whatever you've named them. No preset templates to conform to.
The one-time setup fee (from $100) covers the build, end-to-end testing with real data, and 30 days of post-launch support. No per-call or per-record fees.
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Taking quotes now for Synthflow + Lemlist
Ready to Connect
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Live in 5–10 days
30-day support included
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Tell us your setup — we'll have you live on Synthflow + Lemlist in days.
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Integrations as low as $100 setup · Monthly from $50/mo
Before you go
See what Lemlist + Synthflow teams get
Every call logged automatically. Every recording in Lemlist. Zero manual entry.
42
minutes saved per…
99%
of calls logged a…
+38%
more deals create…
< 0.4s
from call end to …
Want these results? Book a free 30-min call — we'll audit your Synthflow and Lemlist setup and give you a quote on the same call.
30-min call
Free quote same day
No commitment