Noboa, first elected in 2023 to finish out his predecessor's term, says his deployment of the military on the streets and within prisons, among other measures, has reduced violent deaths by 15 per cent, led to a drastic fall in prison violence, and facilitated the capture of major gang leaders.
His 15 opponents have said more needs to be done to fight the drug trade-related crime that has rocked Ecuador in recent years, but some of their proffered solutions would require likely tricky legislative approval or constitutional changes.
Other policy ideas, such as increased security at borders and ports, Noboa says he is already implementing.
"Today Ecuador has changed and wants to keep changing - it wants to consolidate its triumph," Noboa said at a closing campaign rally on Thursday in Quito.
"We are not a promise anymore - we are a reality in this country, which has taken a decision.
"This Sunday, reclaim your ability to dream."
The 37-year-old heir to a business fortune, Noboa has said he intends to win outright on Sunday.
Two major opinion polls have indicated he could - either by getting more than 50 per cent of the vote or by winning at least 40 per cent while being 10 points ahead of his nearest rival.
Other surveys suggested he would not win outright on Sunday but would triumph in an April run-off against leftist Luisa Gonzalez, who he also faced in 2023.
Both candidates have urged their voters to watch counts at polling stations to prevent any fraud, with politicians from Gonzalez's party calling for a "defence of popular will".
Gonzalez, 47, says she would respond to crime with major military and police operations, pursue allegedly corrupt judges and prosecutors, and implement a social spending plan in the most violent areas.
"We can't talk about controlling violence without thinking of social justice, of building an Ecuador with peace, not with war," Gonzalez said as she closed her campaign in Guayaquil.
"We are moving toward this transformation with each one of you...we'll save ourselves, together."
Former president Rafael Correa said Gonzalez - his protege - was ahead in polling and a win first-round win for her was not impossible.
Noboa, mired in a spat with his vice president that threatened to stymie his campaigning, has announced several 11th-hour policies that seem designed to attract voter attention, including help for migrants who return from the US, tariffs on Mexican imports and a trade deal with Canada.
Voters will also elect 151 members of the National Assembly legislature.
